I am a very new mac user. I was wondering how to move the cursor to the beginning and end of a text line. I tried to use home and end which apparently do not work as expected in a windows/linux system. Okay it works as expected in say word, but doesn't work the same in say firefox or acrobat. Even the command+left arrow works differently in different software. For instance, in adobe it moves to the previous page. Whereas for MS Word it works like home. Are there any command/keyboard shortcuts which works uniformly across all softwares?