Answers:
我刚刚为菜单栏项目分配了自定义快捷方式。
您也可以像这样为AppleScript分配快捷方式。
try
tell application "Skim" to tell document 1
if item -2 of (view settings as list) is single page then
set view settings to {display mode:single page continuous}
else
set view settings to {display mode:single page}
end if
end tell
end try