LibreOffice Calc scrolls from cell to cell instead of character by character. If a cell's contents don't all fit on the screen in the current resolution, the entirety of that cell is never visible.
See OpenOffice.org bug 81907: http://openoffice.org/bugzilla/show_bug.cgi?id=81907
DUP of "Bug 34689 - UI scroll problem: Cell with dimensions exceeding screen dimensions impossible to work with".
Please feel free to reopen this Bug if you find evidence that we have an independent issue here.
*** This bug has been marked as a duplicate of bug 34689 ***