I had an interesting challenge today, I had a few hundred spot levels that were at the wrong height. Due to importing a DXF file and scaling, the stake objects were out by a factor of 10. I had to select each stake object and multiply the height of the object by 10.
I used the Custom Selection command from the Tools menu. This allows you to select objects immediately, or create a script.
There is some great protected information here that is only available to paying subscribers. You must be an active paying subscriber to see it, but you can Subscribe here.What a time saver though. Changing the heights in this way took about 5 mins, much better than the 90 mins it took to place all the stake objects.