another question, in the xschem viewer is it possible to put a rule to take exact values or zoom?

If you save the schematic the zoom level is saved. If you change zoom in a graph force a save by using 'File->Saveas' function. pressing the 'b' key inside a graph brings up the 'b' cursor which annotates values in the schematic at cursor position.

What you mention about unset is so that the operating point changes while I move the curve?

The first time you write a raw file appendwrite must not be set otherwise you keep adding data to the same file. For measureents enable Simulation->Live annotate probes with 'b' cursor, then press 'b' insde the graph and see annotated values in the schematic while you move the b cursor. Pressing 'a' in the graph brings up the 'a' cursor. This enable measurements inside the graph. Try it and move the 'a' and 'b' cursors and see what happens.

I like how it looks, very cool, but do you know if I can take the data vertically? on the y-axis? I mean the same for x but in y? or that while displaying the x see the value in y?

no only blue, the white cursor sends measurements to schematic annotation.

when I press 's' it asks me if I want to simulate the circuit

press 's' inside the graph

no, a, b works but when pressing "s", it says that if I want to simulate

The 's' key was added on February , 2023. Did you build a recent xschem?

How can I look the version?

If you have a recent schem doing xschem -v will return 3.4.0:

schippes@asus:~/xschem-repo/trunk$ xschem -v
XSCHEM V3.4.0
Copyright (C) 1998-2023 Stefan Schippers

This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

oh that's it, I have 3.1, to update it I have to delete it and reinstall it right?

yes to update you update the xschem sources, recompile and reinstall. No need to delete, xschem will be updated.

thanks

If you double click in a graph the dialog box has a 'Unlocked X axis' checkbox. If this is set the graph will not adjust X axis while moving the other graphs. Pressing 'f' while the mouse is inside the graph will do a full zoom of the X axis. Pressing 'f' with the mouse close to the left of the Y axis will do a full Y zoom. https://xschem.sourceforge.io/stefan/xschem_man/video_tutorials/xschem_graphs.mp4

thanks