It is well worth spending a few minutes practicing the use of the mouse wheel in a gCAD+ drawing.

Mouse wheel Here is a short movie in which we open a complex landscape design for a subdivision that includes extensive active play areas for children. The mouse wheel is used to efficiently manage both zoomed in and out views of the drawing. Double clicking the wheel of the mouse to activate Zoom extents shows a common problem that's overcome by right clicking and selecting Zoom Previous.

Use mouse wheel