You can strikethrough text that is originally part of the contract, such as the main terms that come part of a contract.
You cannot strikethrough newly entered text (green text) as seen in the example below. This is for both Additional Clauses and Main Term Clauses.
After copying a CP that has had newly entered green text it will become black which will allow the user to strike through the text.
Struckthrough text in the additional clause section will not show up when exporting the final copy of a CP.