Split (group, reciprocal organized, hotkey, and current zen split rearrange)

[Jackihio]

1. Split Group

A group should be made automatically when split is activated. User can add tab and remove tab from the split group easily.

Tabs in the split group can allow users to 'link' (ghost) or move the 'actual tab' into the split group. In this case, delete or remove the 'linked tabs' from the split group will not remove the 'actual tab'. The 'linked tab' is just like shortcut(.ink) in win10. It does not destroy or change where it is, but just get called out when it is needed.

2. Reciprocal Organized (Sidebar/Display)

i,) Work at either sidebar or display and reflect the result on both.
If users drag a down to b at the sidebar, the split view at the right should also react to it. It should be now in the split view b (left, top), a (left, buttom), c (right). Vice versa, if user re-arrange order in the split view directly, it should also reflect at the right tab bar.

ii.) Work between sidebar and display
Allowing users to drag tabs from the sidebar to the split display directly is nice. That allow user to organize the order seeing the result directly which is visually pleasant.
Well, I guess nobody will need a vice versa operation? Can't imagine who will want to drag a tab from the display to rearrange the 'actual tab' in the sidebar. At this point, just drag the tab from the split group, maybe.
(P.S. I said actual tab above, as the linked tab should be gone if it is dragged out from the split group no matter from display or sidebar)

3. Function Needed Hotkey
i.) tab replace
ii.) rearrange

This is just function that need hotkey. We don't need to make one hotkey for each function, instead we can hold down some modifier to enter Split Mode which activate certain function between sidebar and display.
Let's say 'Alt' is the hotkey.

To make it easier to operate in Split Mode after holding down 'Alt',

• sidebar compact mode should be disabled temporarily (maybe optional in the setting)
• selecting tab at the sidebar will not jump to it.

i.) tab replace
After entering the Split Mode, select 2 tabs from either sidebar or display or 1 from sidebar and 1 from display by holding 'Ctrl'. Once user select 2 tabs, they should swap automatically.

ii.) rearrange
After entering the Split Mode, drag tab from the sidebar directly to the display to add tab into split group and arrange order at the same time. Holding shift to make the new added tab as a 'linked tab'.

4. Current Zen Rearrange Mode

i.) contrast is too little, difficult to see

ii.) show the dynamic result directly instead of transparent zone only might be better. User know what they got instantly and can keep modifying until they satisfied without the need of letting go LMB and check the result.