It has been a while I have been using Blender with little knowledge of it. I often use key shortcuts to get quicker in modeling, but it happens sometimes that I miss a letter or press a wrong letter instead, that creates some issues. Long time ago I had the problem by clicking "h", which was hiding the model and I couldn't figure out what I was doing.
This time I cannot see my selections anymore, whether in object/edit mode. Neither the full orange model outlines appear, nor the vertices.. So it is very uncomfortable to use. I may have triggered/toggled something relating to the view. I tried to restart Blender, but nothing changed.
If somebody knows what is it about, I'd be happy to get this problem solved! :)