Copy Edit:/ waveform to Sim:/ waveform in Modelsim
The easiest way is to run the wave.do from the modelsim command line (Transcript window). 



I usually have script that runs all these setup operations for me (simulation, waveform window reloading and running):

vsim -t 1ps design_tb

restart -f -nowave    
do wave.do

run 200 us