In the template editor, each block has a Conditions menu where you can choose conditions to display the block.
1️⃣ Access your signature templates
From the template menu, choose the desired signature template and click on edit.
2️⃣ Enable/disable conditions
Select a block and click on Conditions.
You have several options:
On all blocks :
You can choose if the block is displayed :
Only on new emails
Only on replies/forwards
Via the add-in:
You can choose on which type of email the template is displayed:
On the photo block
You have the possibility to choose the Replace option if your user does not have a photo. In this case the photo will be replaced by the company logo.