@JosEda, Sorry but I don't understand your question: please give more information. What Editor or canvas were you in when you pressed TAB? What were you doing when you pressed TAB? What are ABAs? Can you post a screenshot to show what your screen looks like after you pressed TAB? * **Did your screen look like this before you pressed TAB: with the right hand Attributes panel hidden?**  * **Does your screen now look something like this?**  * If yes, then click anywhere in the white or grid area then press TAB again and pause to see if the screen reappears looking normal. Repeat until the screen reappears looking normal. Pause between each TAB press so you do not miss the press that returns the screen to normal and have to go round again. When your screen returns to normal, click on the arrow on the right hand panel:  to reopen the attributes panel: