Missing Calculate Weight Button in Assembly Item

Scenario

User wanted to automatically calculate all of components' total weight in the Assembly item but could not find the Calculate Weight button.

Solution

1. Navigate to Customization > Forms > Entry Forms
2. Click Edit besides preferred Item Form
   
3. Click Fields subtab
4. Click Sales/Pricing sublist
5. CUBIC Weight: Enter Checkmark on Show Checkbox
   Note: Item Weight field will be enabled.
6. Click Save

Note: Calculate Weight button is only available in Item Record when in Edit mode.