Dp 4.12 Hiding Waveforms ???? Options

[binus]

Hello,
Yesterday, after having deleted two tracks, saved and restarted later, the waves in the remaining tracks were no more seeable.
The marker well had gone too...
And this is the same for all of my other projects.
If I record something, the wave is seen during the process but disappears as soon as I stop it... nevertheless the soundbites is created....

Important: the sound is still heard, and the waves can be seen in the Wave Editor.

I unstalled and reinstalled the program, with no result.

Thank you for any hint...

G4 733. OS 1.2.8. DP 4.12.

[binus]

Looks like this post did not raise enthusiasm...
Anyway I eventually found the solution: settings had been changed for unknown reason, in the preferences ... (menu configuration in the right part of the upper bar of DP4).