User-defined display line heigth

There is a SyntaxEditor.MinimumDisplayLineHeight property you can set, however if your make it smaller and the font would use more height than that, the font size's height will be used. So for smaller display line heights, you'd probably need to reduce font size too.

The setting affects all lines, there isn't a way to change it just for specific lines.

What if override SyntaxEditor.OnRender ?

That only renders the line in the space designated. It won't let you change the height.

I'll try to clarify the problem: in case 1 line in text is large (like 22pt) - others (10pt) will have unusable line heights. Do you see any workaround or it's impossible to do?

Max,

Right now it keeps all lines the same height. This is something we hope to improve down the road when we convert some of the techniques we use in the WPF version and implement them in the WinForms version.