Change short name of buffers
The short name of buffers can be changed with
/buffer set short_name <new_name> command. This might be useful for long channel names displayed in the buffers bar (with script buffers.pl).
For example on channel #weechat:
/buffer set short_name #wee
New value is used immediately, but is not saved in config file. To make it persistent, you have to use script buffer_autoset.py:
/autosetbuffer add irc.freenode.#weechat short_name #wee
Note1: it's not recommended to set short name of query buffers, because WeeChat will change name of buffer when nick changes.
Note2: you should use command
/buffer set with precautions, it is not recommended to change other buffer properties if you're not sure about what you do. This could lead to weird behaviour or a crash.