Using Windows 10 with Excel 2010, I'm connecting to my desktop via Citrix. When writing in a Excel file, if I want to write more lines in a single cell, to make a list of things: when I hit ALT+ENTER, this closes all my Excel application and files and the screen becomes black. After a while, it shows again my desktop, but then I have to restart Excel and reopen the file. Looks like ALT+ENTER is interpreted as a sort of "shut down the Excel application". Hence I can't write more than one line in the cell (I'm not interested in the Alignement - Wrap Text. I need to write a list). Thanks for your guess .