diff --git a/src/about/versioning.md b/src/about/versioning.md
index 365618c2..6a49c115 100644
--- a/src/about/versioning.md
+++ b/src/about/versioning.md
@@ -58,7 +58,7 @@ Version admonitions are used for features introduced **after 2.0** (i.e., versio
 
 !!! version-deprecated "Deprecated in 2.1, removed in 3.0"
 
-    The `allow_direct_insert` parameter is deprecated. Use `dj.config['safemode']` instead.
+    The `legacy_option` parameter is deprecated. Use `replacement_option` instead.
 
 **Note:** Features deprecated at the 2.0 baseline (coming from pre-2.0) are documented in the [Migration Guide](../how-to/migrate-to-v20.md) rather than with admonitions, since this documentation assumes 2.0 as the baseline.
 
diff --git a/src/explanation/relational-workflow-model.md b/src/explanation/relational-workflow-model.md
index fac1d7f7..72bc2964 100644
--- a/src/explanation/relational-workflow-model.md
+++ b/src/explanation/relational-workflow-model.md
@@ -145,17 +145,44 @@ work in practice.
 
 ### Workflow steps and table tiers
 
-Tables are classified into tiers by data-entry mode:
+Tables are classified into tiers by what puts rows in them.
 
-| Tier | Role | `make()` |
-|------|------|----------|
-| **Manual** | Rows entered at runtime from outside the pipeline (people, forms, instruments, imports) | No |
-| **Lookup** | Reference rows defined in the schema itself via `contents` | No |
-| **Imported** | Reach out to data sources outside DataJoint (instruments, ELNs, external databases) | Yes |
-| **Computed** | Derive their contents entirely from upstream DataJoint tables | Yes |
+| Tier | Rows come from | What puts them there | `make()` |
+|------|----------------|----------------------|----------|
+| **Lookup** | The committed schema | The table's own `contents`, versioned with the code | No |
+| **Manual** | Outside the pipeline | A writer outside the table — a person, an instrument, an entry script | No |
+| **Imported** | Outside the pipeline | The table itself, fetching through `make()` | Yes |
+| **Computed** | Other DataJoint tables | The table itself, deriving through `make()` | Yes |
 
-Imported and Computed tables define computations via `make()` methods. The
-`make()` method specifies how each entity is derived — declared within the
+The table shows **Manual** and **Imported** drawing on the same origin. What
+separates them is who initiates the write.
+
+A Manual table is written by an external process, on that process's schedule.
+An Imported table is filled automatically: `populate()` works through the keys
+its parents already hold and calls `make()` for each one still missing.
+
+Their primary keys follow from that. `populate()` has to know which entity it
+is working on before `make()` runs, so every attribute of an Imported table's
+primary key arrives through a foreign key. A Manual table carries no such
+constraint — it may sit at the head of the pipeline with no parent at all, and
+may introduce primary-key attributes of its own. That is what makes it the
+place a new entity enters.
+
+!!! version-added "New in 2.3.4"
+
+    Three tiers gain a second name: **`dj.Entry`** for `dj.Manual`,
+    **`dj.Ingest`** for `dj.Imported`, and **`dj.Compute`** for `dj.Computed`.
+    Each pair is one class, so either name declares the same table, and both
+    names are permanent. `dj.Lookup` and `dj.Part` are unchanged.
+
+    These pages use the original names. The new ones become primary in 2.4
+    ([datajoint-python#1546](https://github.com/datajoint/datajoint-python/issues/1546)).
+
+`Part` is absent because it is not a tier of its own. A part table fills a
+structural role: it inherits its master's tier and is written in the same
+transaction. Any tier can serve as a master.
+
+The `make()` method specifies how each entity is derived — declared within the
 table definition, not in an external workflow file.
 
 #### Manual vs. Lookup
diff --git a/src/how-to/define-tables.md b/src/how-to/define-tables.md
index 7fb5f850..a0833adc 100644
--- a/src/how-to/define-tables.md
+++ b/src/how-to/define-tables.md
@@ -30,7 +30,7 @@ class MyTable(dj.Manual):
 
 | Type | Base Class | Purpose |
 |------|------------|---------|
-| Manual | `dj.Manual` | Data inserted directly from outside the pipeline (forms, instruments, ingestion scripts) |
+| Manual | `dj.Manual` | Data inserted directly from outside the pipeline (forms, instruments, entry scripts) |
 | Lookup | `dj.Lookup` | Reference data defined in the schema via `contents` |
 | Imported | `dj.Imported` | Populated by `make()` from an external source |
 | Computed | `dj.Computed` | Populated by `make()` from other tables |
@@ -266,8 +266,8 @@ data management?**
   process, not a runtime insert.
 - Use **`dj.Manual`** when the rows are **populated at runtime** and their quality
   is guaranteed by the **data-management process** — validation, curation, and
-  access control at ingest, not code review. Subjects, sessions, samples, or
-  anything typed into a form, ingested from a file, or read from an instrument.
+  access control at entry, not code review. Subjects, sessions, samples, or
+  anything typed into a form, loaded from a file, or read from an instrument.
 
 This resolves the case that "where a row comes from" leaves ambiguous: a controlled
 vocabulary that is **populated at runtime** — gene symbols loaded from an external
diff --git a/src/how-to/insert-data.md b/src/how-to/insert-data.md
index fa9cff1b..221c7274 100644
--- a/src/how-to/insert-data.md
+++ b/src/how-to/insert-data.md
@@ -59,7 +59,7 @@ Subject.insert(rows, ignore_extra_fields=True)
 
 The sections above target **Manual** tables — the tier whose rows are inserted
 directly, from outside the DataJoint pipeline (whether entered by hand through a
-form or GUI, or loaded by an automated ingestion tool). Other tiers get their
+form or GUI, or loaded by an automated entry script). Other tiers get their
 rows a different way, and inserting into them directly breaks reproducibility:
 
 - **Computed and Imported tables** — their rows are produced only by `make()`
diff --git a/src/how-to/installation.md b/src/how-to/installation.md
index b3a78aa5..8ba8d0ab 100644
--- a/src/how-to/installation.md
+++ b/src/how-to/installation.md
@@ -159,7 +159,7 @@ Session.insert1({'subject_id': 1, 'session_idx': 1, 'session_date': '2026-01-06'
 SessionAnalysis.populate()
 ```
 
-`Subject` and `Session` are entered by hand; `SessionAnalysis` derives from `Session` and fills
+`Subject` and `Session` are written from outside the pipeline; `SessionAnalysis` derives from `Session` and fills
 itself when you call `populate()`. That dependency — declared with `->` — is the whole of the
 [Relational Workflow Model](../explanation/relational-workflow-model.md) in miniature.
 
diff --git a/src/reference/specs/table-declaration.md b/src/reference/specs/table-declaration.md
index 6bbb9833..0d994c14 100644
--- a/src/reference/specs/table-declaration.md
+++ b/src/reference/specs/table-declaration.md
@@ -23,7 +23,7 @@ class TableName(dj.Manual):
 
 | Tier | Base Class | Table Prefix | Purpose |
 |------|------------|--------------|---------|
-| Manual | `dj.Manual` | (none) | Data inserted at runtime from outside the pipeline (users, instruments, ingestion scripts); quality assured by the data-management process |
+| Manual | `dj.Manual` | (none) | Data inserted at runtime from outside the pipeline (users, instruments, entry scripts); quality assured by the data-management process |
 | Lookup | `dj.Lookup` | `#` | Reference data defined in the schema via `contents`; quality assured by code review |
 | Imported | `dj.Imported` | `_` | Populated by `make()` from an external source |
 | Computed | `dj.Computed` | `__` | Derived from other tables |
diff --git a/src/tutorials/advanced/sql-comparison.ipynb b/src/tutorials/advanced/sql-comparison.ipynb
index 68dbd121..a2fc5fcd 100644
--- a/src/tutorials/advanced/sql-comparison.ipynb
+++ b/src/tutorials/advanced/sql-comparison.ipynb
@@ -2067,7 +2067,7 @@
     "| Tier | Purpose | SQL Equivalent |\n",
     "|------|---------|----------------|\n",
     "| `Lookup` | Reference data, parameters | Regular table |\n",
-    "| `Manual` | Data inserted directly from outside the pipeline (people or ingestion scripts) | Regular table |\n",
+    "| `Manual` | Data inserted directly from outside the pipeline (people or entry scripts) | Regular table |\n",
     "| `Imported` | Data from external sources (files, instruments, databases), populated by `make()` | Regular table + trigger |\n",
     "| `Computed` | Derived results | Materialized view + trigger |\n",
     "\n",
diff --git a/src/tutorials/basics/01-first-pipeline.ipynb b/src/tutorials/basics/01-first-pipeline.ipynb
index 031d3f31..c5d83802 100644
--- a/src/tutorials/basics/01-first-pipeline.ipynb
+++ b/src/tutorials/basics/01-first-pipeline.ipynb
@@ -13,7 +13,7 @@
     "- Use the four core operations: restriction, projection, join, aggregation\n",
     "- Understand the schema diagram\n",
     "\n",
-    "We'll work with **Manual tables** only—tables where you enter data directly. Later tutorials introduce automated computation.\n",
+    "We'll work with **Manual tables** only—tables whose rows are written from outside the table, here by you. A Manual table is not necessarily hand-filled; an instrument or an entry script writes to one the same way. Later tutorials introduce automated computation.\n",
     "\n",
     "> **Database Backend:** All tutorials work identically on **MySQL** and **PostgreSQL** (PostgreSQL support added in DataJoint Python 2.1). The examples shown here were executed on PostgreSQL, but you can follow along using either backend.\n",
     "\n",
diff --git a/src/tutorials/basics/02-schema-design.ipynb b/src/tutorials/basics/02-schema-design.ipynb
index b93b334a..2f8fc670 100644
--- a/src/tutorials/basics/02-schema-design.ipynb
+++ b/src/tutorials/basics/02-schema-design.ipynb
@@ -48,20 +48,22 @@
    "source": [
     "## Table Tiers\n",
     "\n",
-    "DataJoint has four table tiers, each serving a different purpose:\n",
+    "DataJoint has four table tiers, classified by what puts rows in them.\n",
     "\n",
-    "| Tier | Class | Purpose | Data Entry |\n",
-    "|------|-------|---------|------------|\n",
-    "| **Manual** | `dj.Manual` | Core experimental data | Inserted directly by operators, instruments, or ingestion scripts |\n",
-    "| **Lookup** | `dj.Lookup` | Reference/configuration data | Pre-populated, rarely changes |\n",
-    "| **Imported** | `dj.Imported` | Data from external sources (files, instruments, databases) | Auto-populated via `make()` |\n",
-    "| **Computed** | `dj.Computed` | Derived/processed data | Auto-populated via `make()` |\n",
+    "| Tier | Class | What puts rows in it | Typical use |\n",
+    "|------|-------|----------------------|-------------|\n",
+    "| **Manual** | `dj.Manual` | A writer outside the table — an operator, an instrument, an entry script | Core experimental data |\n",
+    "| **Lookup** | `dj.Lookup` | The schema definition itself — the table's committed `contents` | Reference and configuration data |\n",
+    "| **Imported** | `dj.Imported` | The table's own `make()`, reading an external source | Files, instruments, external databases |\n",
+    "| **Computed** | `dj.Computed` | The table's own `make()`, deriving from other tables | Derived and processed data |\n",
     "\n",
-    "**Manual** tables are not necessarily populated by hand—they contain data entered into the pipeline by operators, instruments, or ingestion scripts using `insert` commands. In contrast, **Imported** and **Computed** tables are auto-populated by calling the `.populate()` method, which invokes the `make()` callback for each missing entry.\n",
+    "Rows reach a **Manual** table from outside it, through `insert` — a person typing, an instrument, or a nightly entry script all write the same way. **Imported** and **Computed** are the tiers the framework fills: calling `.populate()` invokes `make()` for each missing entry.\n",
+    "\n",
+    "See [the Relational Workflow Model](../../../explanation/relational-workflow-model/#workflow-steps-and-table-tiers) for the full axis, including why `Part` is not a fifth tier.\n",
     "\n",
     "### Manual Tables\n",
     "\n",
-    "Manual tables store data that is inserted directly—the starting point of your pipeline."
+    "Manual tables store rows written from outside the table—the starting point of your pipeline."
    ]
   },
   {
@@ -1420,7 +1422,7 @@
     "- Keep keys minimal but sufficient for uniqueness\n",
     "\n",
     "### 2. Use Appropriate Table Tiers\n",
-    "- **Manual**: Data inserted directly — by operators, instruments, or ingestion scripts\n",
+    "- **Manual**: Data inserted directly — by operators, instruments, or entry scripts\n",
     "- **Lookup**: Configuration, parameters, reference data\n",
     "- **Imported**: Data read from external sources (recordings, images, instruments)\n",
     "- **Computed**: Derived analyses and summaries\n",
diff --git a/src/tutorials/domain/calcium-imaging/calcium-imaging.ipynb b/src/tutorials/domain/calcium-imaging/calcium-imaging.ipynb
index 288648cd..ea642dcc 100644
--- a/src/tutorials/domain/calcium-imaging/calcium-imaging.ipynb
+++ b/src/tutorials/domain/calcium-imaging/calcium-imaging.ipynb
@@ -1517,7 +1517,7 @@
    "metadata": {},
    "source": [
     "**Legend:**\n",
-    "- **Green rounded boxes**: Manual tables (data entered at runtime — by a person, an instrument, or an ingestion script)\n",
+    "- **Green rounded boxes**: Manual tables (data entered at runtime — by a person, an instrument, or an entry script)\n",
     "- **Gray rounded boxes**: Lookup tables (parameters, part of the schema definition)\n",
     "- **Blue ellipses**: Imported tables (data from files)\n",
     "- **Orange ellipses**: Computed tables (derived from other tables)\n",
diff --git a/src/tutorials/examples/blob-detection.ipynb b/src/tutorials/examples/blob-detection.ipynb
index e0c6d643..8cbfd375 100644
--- a/src/tutorials/examples/blob-detection.ipynb
+++ b/src/tutorials/examples/blob-detection.ipynb
@@ -637,7 +637,7 @@
    "metadata": {},
    "source": [
     "The diagram shows:\n",
-    "- **Green** = Manual tables (data inserted directly, manually or via ingestion)\n",
+    "- **Green** = Manual tables (data inserted directly, manually or by an entry script)\n",
     "- **Gray** = Lookup tables (reference data)\n",
     "- **Red** = Computed tables (derived data)\n",
     "- **Edges** = Dependencies (foreign keys), always flow top-to-bottom"