Under File Tools, there is a Super User mode for Konqueror but none for Dolphin.
It would be very helpful if it is there as I prefer Dolphin to Konqueror.
Any workaround to add one?
You can simply switch your 'File Manager - Super User' from Konqueror to Dolphin in about 1 minute flat if that's what u want.
Right click 'Application Launcher' then click 'Menu Editor'
Click the + next to 'File Tools' then you will see 'Konqueror - Super User Mode' from the drop down list. Click on it.
In the 'General' tab rename everthing like so..
Name: Dolphin - Super User Mode
Command: dolphin %i -caption "%c" "%u"
Then click the 'Advanced' tab
check 'Run as different user'
Close out of Menu Editor and click 'Save'
Many good options posted already. Just another one. Take your pick. That's what Linux is all about that for me.