Installation:

Download the add-on ZIP file from the Blender Market.

Open Blender and go to Edit > Preferences.

Navigate to the Add-ons tab.

Click the "Install..." button at the top right.

Select the add-on ZIP file and click "Install Add-on".

Enable the add-on by checking the box next to "Custom Split Window" in the add-ons list.

The add-on is now installed and ready to use.

Usage:

After installing the add-on, you can find it in the "Tool" tab of the 3D Viewport.

Click the "Split Horizontal" button to split the viewport horizontally.

Click the "Split Vertical" button to split the viewport vertically.

Adjust the split by dragging the divider between viewports.

Compatibility:

Custom Split Window is compatible with Blender versions 2.80 and above.

Support:

For any questions or issues, please contact [Your Name] at [Your Email] or visit our support page [URL].

FAQ:

Q: How do I remove the split in the viewport?

A: To remove the split, simply click and drag the divider all the way to one side or the other until it disappears.

Q: Can I customize the shortcut keys for splitting the viewport?

A: At the moment, the add-on does not support customizing shortcut keys, but this feature may be added in a future update.