The new Windows clipboard is still too new to be hackable. It has also not externalized its functional parameters in the registry as of yet.
All that is known about it is that it is enabled via:
- Settings > System > Clipboard
- Group Policy (gpedit.msc) in
Computer Configuration > Administrative Templates > System > OS Policies > Allow Clipboard History
- In the registry at HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows by the values AllowClipboardHistory and AllowCrossDeviceClipboard.
That just about sums up everything that is known. We don't know any way of extending its size beyond 25, as specified in Microsoft's article
Get help with clipboard, and there is also no way to move or extend its window from the bottom-right of the screen.
For more functionality, one is today still obliged to use third-party products, of which there are many.
You may find some lists with reviews in the articles: