Tips with Keyboard and Mouse

Navigation

Space + Mouse Drag	Move the view. See also: Pan Tool
Mouse Wheel Down	Pan while holding the mouse wheel down.
Mouse Wheel + Ctrl	Zoom in/Zoom out. See also: Zoom Tools
Mouse Wheel	Move the view vertically.
Mouse Wheel + Shift	Move the view horizontally.
F5	Redraw
F6	Pan
F7	Zoom In
F8	Zoom Out

There are some Shortcuts by default corresponding to view and navigation functions.

Shift +	Continue an existing line. Press the Shift key and click the end point of the line to be continued. This can be used instead of the Merge function.
Shift +	Drawing circular objects from the center point.
Ctrl +	Following Existing Objects.
Alt +	Draw horizontal or vertical lines. Press the Alt key while drawing. The line snaps in a vertical or horizontal direction. This can be useful when drawing a border or north lines.
Tab	Change drawing mode during drawing and editing. Press the Tab key until the desired drawing mode appears to change the drawing mode.
P	Press the P key to change to the last used drawing mode.

Visit the Drawing and Editing Section in the OCAD Preferences to choose your favourite settings.

Shift + or	Object not selected: add to the selected objects. As an alternative, drag an area with the Left Mouse Button. Selected object: remove from selected objects. Keep right angle when moving a corner (e.g. building).
Ctrl +	Remove Vertex
Ctrl + + Mouse	Remove Vertex with Mouse Over.
Shift + Ctrl +	Add Vertex
Alt +	Select an object under a already selected object
Alt + or	Select next object for editing
Arrow Keys	Move selected objects (fine tuning)
Arrow Keys	Double Click on Vertex and Move Vertex With Arrow Keys.
Tab +	Move neighboring Segments and congruent Vertices in one single step.
Shift + Arrow Keys	Move selected objects (fast)
P	Get latest used drawing tool
A	Change to the Select Object and Edit Vertex mode.
V	Change to the Select and Edit Object mode.