OneCAD/docs/book/src/guide/ui-tour.md

A tour of the window

• Title bar. On Windows and Linux the application bar is the window's title bar: File, save, undo and redo, the start page, the theme, Help, and one tab per open design (each with its own undo history, selection and camera).
• Toolbar. The workspace switcher (DESIGN) sits on the left. The tabs (SOLID, SURFACE, SHEET METAL, PLASTIC, UTILITIES, and SKETCH while you sketch) hold panels of commands. Click a panel's name for all its commands.
• Browser (left). The design as a tree: document settings and units, named views, the origin, bodies, sketches, construction planes, canvases, joints and components. The eye shows or hides an item, a component's radio button makes it the active component, and right-clicking any row gives that item's menu. Rows drag into groups and other components.
• Viewport. Click to select, Shift or Ctrl to add, drag for a window or crossing box. The wheel zooms at the cursor, the middle button pans and right-drag orbits freely (the mouse preset in Preferences switches to SolidWorks or Inventor style). Hold Shift during an orbit to snap to the nearest standard or diagonal view; the default Shift+middle gesture also snaps. The axis view shows the world's X/Y/Z directions in SolveCraft's colors. Click a signed axis tip to look along that axis; click the aligned tip again to look from the opposite side. Drag the axis view to orbit around the view centre, with Shift for snapping. Top and bottom keep the nearest quarter-turn heading. The house and navigation bar's Home button go home. Right-click for the marking menu: eight commands around the cursor, plus a menu for whatever is under it.
• Dialogs dock on the right with a live preview. Most features also show drag handles and a value box in the viewport.
• Timeline (bottom). Every feature in order. Double-click to edit, drag the marker to roll back, and drag features to reorder them.
• S box. Press S anywhere for a command search at the cursor. Pin the commands you use most to its top.

Preferences (File › Preferences) hold the theme, the units of new designs, the mouse preset, the visual style and autosave. Help › Keyboard Shortcuts lists every key, and File › Keyboard Shortcuts changes them.

Shift-orbit snapping includes 45-degree edge views and isometric corner views, with a lightly damped spring transition and a small boundary margin to prevent flicker.