Canvas Basics

The ERD canvas is the main workspace for placing tables and connecting relationships. Switch between select, add, relationship, memo, and group modes as you work.

Basic Screen

Table nodes are placed in the center of the canvas, and work mode buttons are stacked vertically in the left toolbar. The minimap in the upper right shows your current position in large ERDs, and the zoom slider next to it controls zoom in/out.

Work Modes

You can change the current mode from the left toolbar or the canvas right-click menu. In relationship modes, the cursor and node handles change so you can see which type of connection you are creating.

Mode	Action
Select / Move	Select tables, memos, and groups, then adjust their positions.
Add new table	Click the canvas to create a new table node. This is unavailable while locked.
Non-identifying relationship	Connect a parent table and child table to create a regular FK relationship.
Identifying relationship	Create a relationship where the parent key is part of the child table identifier.
Memo	Add an explanatory memo to the canvas.
Group	Drag to draw an area and group multiple tables by business unit.

Pan and Zoom

The canvas supports scroll panning, drag movement, minimap navigation, fit view, and a zoom slider. Node positions snap to a 16px grid, making it easier to keep consistent spacing in large diagrams.

Control	Description
Minimap	Check the current viewport and table distribution across the full ERD.
Zoom slider	Adjust the zoom level with plus/minus buttons or by dragging the slider.
Fit View	Automatically adjusts the viewport so the current ERD fits on screen.
Lock	Locks interactions to prevent accidental node movement or editing.

Context Menu

Right-click an empty canvas area to show mode switching, paste table, auto-layout, image export, and DDL Import menus. Right-click a table to show detail view, save, restore, apply to DB, pull schema again, copy/cut, and column action menus.

Copy, Cut, and Paste

Tables and columns can be copied or cut from the context menu and pasted into the current ERD. If you copy multiple selected tables, the selected group is brought together. During paste, table names, FK names, index names, and constraint names are automatically adjusted when they conflict.

Target	Action
Table	Copies the table structure and ERD placement. Pasting into the same ERD creates it with a non-conflicting name.
Column	Pastes selected columns into another table. If a column name already exists, it is adjusted to a new name.
Scope	Copied items can only be pasted into ERDs with the same Connection and Schema scope.