tell application "System Events"
set frontApp to name of first process whose frontmost is true
end tell
set theCommand to «data utxt2318» as Unicode text
set theControl to «data utxt2303» as Unicode text
set theOption to «data utxt2325» as Unicode text
set theShift to «data utxt21E7» as Unicode text
set theEscape to «data utxt238B» as Unicode text
set theTab to «data utxt21E5» as Unicode text
set theReturn to «data utxt21A9» as Unicode text
set theEnter to «data utxt2324» as Unicode text
set doubleTab to tab & tab
tell application frontApp
choose from list {theShift & doubleTab & "Shift", theControl & doubleTab & "Control", theOption & doubleTab & "Option", theCommand & doubleTab & "Command", theOption & theCommand & doubleTab & "Option+Command", theEscape & doubleTab & "Escape", theTab & doubleTab & "Tab", theReturn & doubleTab & "Return", theEnter & doubleTab & "Enter"} with prompt "Pick the symbols you want:" OK button name "Insert" with multiple selections allowed
end tell
if result is not equal to false then
set pickedSymbols to result as string
set displaySymbols to ""
if pickedSymbols contains "Shift" then
set displaySymbols to displaySymbols & theShift
end if
if pickedSymbols contains "Control" then
set displaySymbols to displaySymbols & theControl
end if
if pickedSymbols contains "Option" then
set displaySymbols to displaySymbols & theOption
end if
if pickedSymbols contains "Command" then
set displaySymbols to displaySymbols & theCommand
end if
if pickedSymbols contains "Escape" then
set displaySymbols to displaySymbols & theEscape
end if
if pickedSymbols contains "Tab" then
set displaySymbols to displaySymbols & theTab
end if
if pickedSymbols contains "Return" then
set displaySymbols to displaySymbols & theReturn
end if
if pickedSymbols contains "Enter" then
set displaySymbols to displaySymbols & theEnter
end if
tell application "System Events"
tell process frontApp
set the clipboard to displaySymbols
keystroke "v" using {command down}
end tell
end tell
end if