Whenever I try to create two sections of the same type in a row LyX unites them as if they were one. I write a definition, press ENTER for a new line, and then want to write another definition on that new line, LyX ignores my intention and moves me back to the previous definition ...
What shall I do?
The "proper" way of doing seems to be to add a "Separator" environment after the first definition1.
The existing answers are now out of date. In LyX 2.2, the separator environment has been replaced by a separator inset. To quote the changelog,
This new separator is introduced with Edit→Start new environment (shortcut Alt+P Enter) or by pressing Enter in an empty Standard paragraph that immediately follows a non-standard one (e.g. enumerate environments).
Just press TAB. It will place another "definition" mark on the follow line.
Say you want to insert several different definitions in a row without writing any text between them. All you need to do is to write your definitions between \begin{defn} and \end{defn} commands. Then you can insert as many definitions in a row as you want.
