Sometimes, an existing Condition is similar enough to a needed Condition that simply creating a copy of it and making minor changes is suitable. For example, if you are taking off several floors of a building and some are 8', 9', and 10' to deck, create the 8' Condition first, then duplicate it twice and simply change the Height in the 2nd and 3rd Conditions.
To Duplicate an existing Condition:
You can duplicate more than one Condition at a time - use the Shift and CTRL buttons to select the Conditions you want to duplicate, then click the Duplicate button.
Duplicate a Condition and reassign takeoff at the same time, see Reassigning Takeoff to a Different or Duplicated Condition for more information.