bottom
Yet another cross-platform graphical process/system monitor
...By default, bottom is somewhat like a dashboard - a bunch of different widgets, all showing different things, and they all cram together to fit into one terminal. If you instead just want to see one widget, maybe you want to look at a graph in more detail, for example, you can "expand" the currently selected widget using the e key, which will hide all other widgets and make that widget take up all available terminal space. To allow for widget-specific keybindings and expansion, there is the idea of widget selection in bottom, where you can focus on a specific widget to work with it. This can be done with the mouse (just click on the widget of interest).