Starting with the version 2.0, you can use the left, the right and the middle mouse button, which allows you to activate up to three tools at the same time. To activate a tool, click on the left-hand side of the button with the mouse button. There are two ways to deactivate a tool:
On the tool button, you will see a symbol representing the mouse with the respective button selected (see Fig. 1.22).
If a tool is activated from the main menu, from the context menu or with a hot key, it is automatically assigned to the left mouse button.
If a limited number of clicks is needed to create a graphic object (e.g. two clicks for a ruler, three clicks for corner measurements), then the creation process will be completed after these clicks. If you need an unlimited number of points to create a graphic object (e.g. a polygon or an MPR curve), you have to double-click the button with which the tool was activated to complete the creation process.
Whether the tool is active or not, the graphic objects created with this tool can be edited with any mouse button, and the right button click invokes the context menu.