I have such a problem because I forgot how to turn on the view of buttons such as effects on the timeline in the drawing I mark what is going on and where these buttons should appear
Have you tried to have some event(s) on the timeline and clicking the Hamburger button(s) (three horizontal lines) on an event and on the Track Headers (video and audio) to "Edit Visible Button Set"?
Also, that would be track fx, not media. VEGAS has a 4 tiered effects system...
at the event level, enabling you to cut one video on the same track into 2, and then apply different effects to each half... If I have a shot thats white balance changes due to the auto-white balance being left on the camera, I split the angle at the point where the white balance shifts, correct it before and after the shift, then smoothly fade one clip into the other for a nice transition of effects from one setting to another.
At the media level, which affects that piece of media uniformly, no matter where it is on the timeline or how many chunks it has been cut into, or even if it isn't on the timeline at all.
At the track level, this is what you are asking us about. FX applied here are applied to all media within that track.
At the project level, you can apply fx to the main fx bus (the fx button by the preview window). These effects will affect every piece of media on the timeline.
There's one more tier, parent and child tracks, but for the most part, those 4 will be what you use most often.