Special pen style for arrow line

[ladofa]

When you go to arrow mode with SHIFT KEY,
the pen style also changed automatically,

If you lift up SHIFT KEY, pen style will go back to the previous.

How about it?

What should be changed? thickness of line?, color?

[ladofa]

It is related with #8

I want to fix the pen style for each board (F1, F2, F3)
If you want to change the pen style you may change the board.
It may restrict style-mixed drawing. But I want to make the operation as simple as possible. Imagine that when you use F1 board with pen 1, then use F2 board, change to pen 2, then go back to F1 board, what pen style will be adopted? I don't want these complex situations.