add info popup box

modules/gui.lua

@@ -147,6 +147,10 @@ pfUI:RegisterModule("gui", function ()
       pfUI.gitter:Hide()
     end
 
+    pfUI.info:ShowInfoBox("|cff33ffccUnlock Mode|r\
+    This mode allows you to move frames by dragging them using the mouse cursor. Frames can be scaled by scrolling up and down.\
+    To scale multiple frames at once (eg. raidframes), hold down the shift key while scrolling. Click into an empty space to go back to the pfUI menu.", 15, pfUI.gitter)
+
     if pfUI.gitter:IsShown() then
       pfUI.gitter:Hide()
       pfUI.gui:Show()