How to Unhide More Than One Sheet in Excel At A Time
1) Hit Alt + F11 (this will open the VBE Window)
2) From the 'Insert Menu' select 'Module' and paste the code below.
3) Select 'References' from the 'Tool Menu' and make sure 'Microsoft Forms 2.0 Object Library' is selected. If it's not listed then click 'browse' and select 'Fm20.dll'
4) Close the VBE window
5) Hit Alt + F8, select 'UnhideAllSheets', click 'Options' and set your shortcut key.