For many years I have been using Alt+Shift+(number) to quickly change the style of text in a text cell. For example when I write descriptive text and want some of that text to look like input form, e.g., "The code x = 1 is used to set the value of x". Here I want the 'x = 1' part to look like input form. In many previous versions of Mathematica you highlighted the text that you wanted to change then pressed Alt+Shift+9. The Alt+Shift+(number) keybinding has been removed from version 10 so that it just acts like Alt+(number) and so Alt+Shift+9 changes the whole cell to input form.
How can the previous behavior be restored?
The official reply from Wolfram was
"There is no documented way to change this feature back. However, for changing the keyboard shortcuts, one could modify the file "KeyEventTranslations.tr" in the subfolder 'SystemFiles/FrontEnd/TextResources' of the Mathematica installation directory. Since this is not documented, we cannot provide support on modifying this file".
I didn't find this very helpful. Could somebody please advise me what to do.