Using the buffer menu,
SPC b b you can switch to any buffer currently open, especially those buffers that are not currently being shown in a window.
You can also delete any of the currently open buffers.
Buffer Transient State
If you want to manage multiple buffers then the buffer transient state is idea,
SPC b .
With a single key you can cycle quickly through all open buffers, forward with
n or backwards with either
k to kill the current buffer.
||Enter buffer transient state|
||Show next buffer|
||Show previous buffer|
||Quit the buffer transient state|
Deleting buffers using buffer menu
The buffer transient state is the simplest way to delete buffers, however if there are a large number of buffers you wish to delete then using the buffer helm-mini menu.
Open the buffer helm-mini menu with
SPC b b (or
SPC B b for global buffers - unsure of the difference)
Then move to any buffer names you want to delete by moving the cursor with
Mark a buffer for deletion using
Once you have marked all the buffers, use
C-D to delete the marked buffers.