thank you @qot. The script wasn't working here (win10).
- added a coma after IfWinActive.
- added send {tab} line between style & size to switch to the size field.
- (!'ve commented the WinWait line as it seems ok without (at least here..) .
#IfWinActive, ahk_exe evernote.exe
^1::SetFontStyle("bold", 18)
^2::SetFontStyle("italic", 16)
^3::SetFontStyle("bold", 14)
^Space::SetFontStyle("regular", 12)
#IfWinActive
SetFontStyle(weight, size) {
currentSendMode := A_SendMode ; Get the current Send Mode
SendMode Event ; Event mode works better in the Font