How to Assign Custom Permission to access Sign Dashboard

Step 1:- Navigate to the home page and search Profile in Quick Find and Open it. 

Step 2:- Select the profile to which you want to assign custom permissions. For example, you can select System Administrator or Standard User, depending on your requirements.

Step 3:- Click on the Enable Custom Permission and Edit it. 

Step 4 :-  Assign the Custom Permission and Save it.