Mobile:
Click More in bottom right corner
Go to Parts Inventory tab
Select Part to attach Picture
Click 3 dots (⋮) next to Restock in top right corner
Select Edit
Click Add or Take Picture
Choose from Camera or My Photos
Camera: Take picture using camera on device
My Photos: Choose existing picture on device
Click Update in top right corner
Web:
Go to Parts Inventory tab
Select Part to attach Picture
Click 3 dots (⋮) next to Restock in top right corner
Select Edit
Click Picture
Select Picture to add from computer
Click Update in bottom right corner