Thank you again Charles for your answer.

I tried yet a transcribe software and a foot pedal.
InqScribe allows what I need, except for font size/type switch.
Instead of loading an audio/video file, you can set just a timer (one hour, two, as you wish), then click play, and set a shortcut to stamp the timecode when you want. A freeware application allows to assign to a foot pedal one or a combination of keys from the keyboard or mouse. so for example I can say InqScribe to use F6 to go on the next line and stamp the time code. Then I assign to the right foot pedal the key F6, and it is done.

The ability to switch font size/type is something I want to use. And I haven't found a transcribe software which allows that. It is normal because a transcribe software isn't desinged for that.

I thought to a professional Word Processor simply because it has programming section, so I can customize features that I need, while a transcribe application is less flexible.

I have also to consider that to use a steno machine is exactly like using a keyboard, the Word Processor doesn't feel the difference. But the steno machine hasn't buttons like F6, Enter, PageUp, etc. I can only write words with that.
So, if I want to use steno machine to stamp timecode or change font (it is faster then using pedal foot, trust me) I have to set the Word Processor to recognize a word to activate that, for example when I type "cvc", it doesn't write "cvc" but simply stamp the timecode. This kind of feature can't be on a transcribe application unless it has a programming environment to set it.

All the 3D applications I worked with before losing my sight had a "Script Editor" environment, where you can add to your project all the features that the application had not inside.

I suppose a Word Processor could work the same.

I thank you Charles for your words. I thank you also for the name you gave to me. I will contact them.

I wish you a merry christmas!
A presto.

Daniele.