I want to change some shortcuts for speed settings in my processes. I know that there is an option to change it from Tools > Editor Options > Key Mappings menu but I want to re-assign some keys manually.
Is it possible to assign them from Delphi IDE directly without using any third party?
Just putting @Rudy Velthuis' comment as a answer:
Yes, you can remap keys, but only using a custom (partial) keybinding package, which you can easily write and install yourself. An example can be found on GitHub. You cannot, however, directly change key mappings "on the fly", unless you use a third party tool.