With the Tools menu tools are started to draw primitives or interactively manipulate the drawing. Click on one of the commands in the figure below for an explanation of it.

Start a zoom tool, in continues mode. Use Left Mouse and drag to zoom in.

A stack is maintained, containing all zoom areas, zoomback and zoomout pop from the stack.

Zoomout to the complete drawing, zoom stack will be empty afterwards.

Zoom back one level.

Start a select tool, mouse Left Down in an element selects it, or mouse Left Down + drag to select all in a box.

Start a de-select tool, mouse Left Down in an element deselects it, or mouse Left Down + drag to deselect all in a box.

To set the layer on which primitives will be drawn.

To set the width for primitives to be drawn.

Choose the tool to draw a primitive

Start a edit tool.

Edit element when Left Down mouse click is in a selected element.

At that moment handles on the element will enable to manipulate the element.

Start a delete tool.

Delete element when Left Down mouse click is in a selected element.