table below describes the actions and the corresponding keystrokes
or mouse operations (Windows versions).
or Mouse Actions
a block from a library
block to the model window with the left button on the
mouse OR use select the COPY and PASTE from EDIT menu.
blocks in a model
the CTRL key and select the block with the left mouse
drag the block to a new location.
on the block
a block (clockwise 90 deg @ each keystroke)
block's label and position the cursor to desired place.
the SHIFT key and drag the block to a new location
a diagonal line
the SHIFT key while dragging the mouse with the left button
cursor to the line to where you want to creat the vertex
and use the left button on the mouse to drag the line
while holding down the SHIFT key