Highlighter

[edemaine]

We discussed the highlighter of #139 today. There are two main components:

• Multiply width by 4
• Turn on transparency (12.5% opacity!)

I'm thinking about two toggles in the attributes bar, one for each of these.

• A "4x width" toggle button would let you access an upper register of line widths. (It would change the meaning of each width-setting button to 4x their value.) Ditto for 2x?
• A transparency toggle button would set to 50% transparency (say), and also bring up a few more buttons for additional transparency amounts (e.g. 25% and 75%, or more). See Transparency #25.

But it still might be annoying to have to click both of these to get into a highlighter mode. Perhaps there should still be a highlighter toggle in the mode menu that turns both of these on/off?