<p>You probably know, toggling case (lower vs. upper case) can already be done with <code>Ctrl</code>-<code>Alt</code>-<code>u</code> and this shortcut can also be configured.</p>
<p>For CamelCase conversion, ages ago I wrote a simple little Python script to just do that:<br>
<a href="https://gist.github.com/eht16/52067a31f2d8cfc3c0fac87d2ab70e28">https://gist.github.com/eht16/52067a31f2d8cfc3c0fac87d2ab70e28</a></p>
<p>Configure this script in Geany as command in the "Send selection to" settings, like in the screenshot.<br>
Then select some text and use <code>Edit->Send Selection to->CamelCase</code>. The script also tries to detect if it is CamelCase to convert to lower_case and vice versa.<br>
For me this works fine since a couple of years.</p>
<p>If I find time, I'll put it in the wiki.<br>
HTH.<br>
<a target="_blank" rel="noopener noreferrer" href="https://user-images.githubusercontent.com/617017/44619652-9eebb200-a88a-11e8-9b04-76e57a8a6779.png"><img src="https://user-images.githubusercontent.com/617017/44619652-9eebb200-a88a-11e8-9b04-76e57a8a6779.png" alt="geany_camel_case" style="max-width:100%;"></a></p>

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