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Using Other Windows
Select another window (`other-window'). That is the letter `o',
Scroll the next window (`scroll-other-window').
Find the next place where the text in the selected window does not
match the text in the next window.
`M-x other-window-any-screen N'
Select the Nth different window on any screen.
To select a different window, use `C-x o' (`other-window'). That is
an `o', for `other', not a zero. When there are more than two windows,
the command moves through all the windows in a cyclic order, generally
top to bottom and left to right. From the rightmost and bottommost
window, it goes back to the one at the upper left corner. A numeric
argument, N, moves several steps in the cyclic order of windows. A
negative numeric argument moves around the cycle in the opposite order.
If the optional second argument ALL_SCREENS is non-`nil', the function
cycles through all screens. When the minibuffer is active, the
minibuffer is the last window in the cycle; you can switch from the
minibuffer window to one of the other windows, and later switch back
and finish supplying the minibuffer argument that is requested. *Note
The command `M-x other-window-any-screen' also selects the window N
steps away in the cyclic order. However, unlike `other-window', this
command selects a window on the next or previous screen instead of
wrapping around to the top or bottom of the current screen, when there
are no more windows.
The usual scrolling commands (Note: Display.) apply to the selected
window only. `C-M-v' (`scroll-other-window') scrolls the window that
`C-x o' would select. Like `C-v', it takes positive and negative
The command `M-x compare-windows' compares the text in the current
window with the text in the next window. Comparison starts at point in
each window. Point moves forward in each window, a character at a time,
until the next set of characters in the two windows are different.
Then the command is finished.
A prefix argument IGNORE-WHITESPACE means ignore changes in
whitespace. The variable `compare-windows-whitespace' controls how
whitespace is skipped.
If `compare-ignore-case' is non-`nil', changes in case are also
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