Preferences Drawing
Connect Lines When Close When this option is on, and you start a new line within ten pixels from the end of a previous line, the lines are automatically connected. This can be a big convenience, and a big inconvenience when you want to draw separate lines in a confined space.
However you have this set, you can temporarily reverse the setting by holding down the Ctrl key when you start the line.
Draw Level/Plumb Lines When this option is on, the lines for many drawing elements will be kept horizontal or vertical despite the mouse veering off a bit.
When this option is off, the lines will go wherever the cursor goes.
However you have this set, you can temporarily reverse the setting by holding down the Shift key as you draw the line.
Scaling Text to Drawing Size
Related item: Text Size Factor on the Preferences Printing Tab.
Space Between Parallel Lines and Double Walled Rectangles
Set the distance to be used between parallel lines and double walled rectangles
Check the box if you want the beginning of first set of parallel lines to be closed.
(Press the Control key while terminating the last segment if you want its end closed)
Select Each Element After it's Drawn When this box is checked, each drawing element will be selected after drawing it. You can use the Alter Plan toolbar to manipulate it before drawing the next element. It will be de-selected when you start the next element.