} // end of ScrollDown()
private void ScrollUp()
{
int numLines = blob.NumLines;
if (numLines - textVisibleLines > topLine)
{
++topLine;
TwitchTextOffset();
// This scroll may have moved the cursor off screen, if so
// move the cursor so that it's back on screen.
int line = 0;
int curPos = 0;
blob.FindCursorLineAndPosition(out line, out curPos);
if (line < topLine)
{
blob.CursorDown();
}
}
} // end of ScrollUp()