Step 1 : Sign In to Marketplace

https://www.notion.so/cstechmk/How-to-Setup-Your-Marketplace-6a9316c5f655479180dc1a621535b4bd#332a57a313d44a04ae54710ce9ed8061

Step 2 : Mouse Hover on Master

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/fcfdc0bd-3e09-4cb0-b2b8-886c4b7f2e32/Snag_478bac.png

Step 3 : Click "Product Attributes"

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/c2902e86-6741-4d3b-b9ac-2b914c446cbc/Snag_48fcb1.png

Step 4 : "Main Attributes" Page is seen , Where you can Manage Attribute Values, Edit , Hide/Show Attributes

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2cd8d71f-475d-44a4-a74f-158151eebf19/Snag_4aa2b0.png

Step 5 : Click the icon shown in image to make changes

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/43f20aaf-c46f-4621-b693-06d86708f705/Snag_4d3726.png

Step 6 : Attributes can be added or edited

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/f868c83f-0f21-4c3f-84cb-ab206e6dfc2d/Snag_4dfb03.png

Step 7 : Click "Custom Attribute"

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/005115c1-64cd-4787-9a3e-8d9288b3f74c/Snag_511cb5.png

Step 8 : By Entering Name , Selecting Type and Sequence Id , you can create new custom attribute.

you can EDIT / Delete Custom Attributes