n class="string">'l'</span>);
0281     acq.offset = acq.offset - increment;
0282     <span class="keyword">elseif</span> strcmp( keypressed, <span class="string">'o'</span>);
0283         acq.offset = acq.offset + increment;
0284 
0285     <span class="comment">% Scale changes</span>
0286     <span class="keyword">elseif</span> strcmp( keypressed, <span class="string">'x'</span>);
0287         acq.scale = acq.scale - increment;
0288     <span class="keyword">elseif</span> strcmp( keypressed, <span class="st