If I try to draw lines or traces with the “Route Tracks” or “Add graphic lines/poligon” icon selected (blue rectangular selection background drown), sometimes clicking and dragging the mouse pointer draws a selection rectangle, and shows the “Block Operation” pop-up.
What is the cause of this behaviour? Does it mean that I am not allowed draw lines because of certain conditions?
I think most of kicad’s drawing tools are “click on start, click on end” and not “click and drag” to draw. Maybe you are confusing the two? Or maybe I misunderstand what the issue is.
Click and drag (blue block selection) will temporarily override line and track drawing. ie. you can move a group of items then return to drawing without having to click your drawing icon again.
This is normal behavior. Note: Left to right block selection will give a different result to right to left selection.
Moving and dragging lines and tracks is best done with the hot keys M for move and G for drag.
Just hover mouse cross-hairs over what you wish to move/drag then press hotkey.
If this (selection possible during track route mode) is normal intended behaviour then there could be a bug. But as I don’t use this feature (until now, the mix of working modes seems not consistent/natural to me) I’m not the person to really judge on this.
There is a difference between selecting one ore multiple items during “route mode” with the blue selection-rectangle:
if selecting multiple items the working mode stays in “routing mode”
if selecting only one item the routing mode is cancelled and instead the cursor changes to “movement mode” (cursor with arrow-cross)