Insertion Slot
This
is the "slot" between any 2 bordered scenes in the Timeline
where you drop your clip or scene(s) for insertion. The slot "cursor"
(a vertical orange line with 2 arrows at each end) is normally concealed
but comes to live when you hover your mouse over it for more than
1/2 second long.
Drag-N-Drop Insert
a)
You may drag-n-drop clip from asset bin or from Preview Window to
insert it at the desired "slot" anywhere in the timeline.
b)
You may drag-n-drop a scene or a selection of scenes from one place
of the timeline to insert it to a desired "slot" anywhere
else in the timeline.
c)
When you drag a selection hovering over an insertion slot, the slot
"cursor" will flashes itself alerting you an "insert"
is imminent.
Copy-N-Paste Insert
An
insert can also be done by copying scene(s) into memory first, then
insert a "clipboard" copy of it to the desired location.
The way to go about such paste is to right-mouse-click on the desired
"insertion slot". When the contextual menu is open, click
on "paste" command to deliver the insert.