Hi Manes,
You can open this file: root/templates/uber/tpls/blocks/off-canvas.php
Look for this snippet of code:
<button class="btn btn-primary off-canvas-toggle <?php $this->_c('off-canvas') ?>" type="button" data-pos="right" data-nav="#t3-off-canvas" data-effect="<?php echo $this->getParam('addon_offcanvas_effect', 'off-canvas-effect-4') ?>">
<span><?php echo JText::_( 'TPL_MENU' ); ?></span> <i class="fa fa-bars"></i>
</button>
change it to:
<button class="btn btn-primary off-canvas-toggle hidden-md hidden-lg <?php $this->_c('off-canvas') ?>" type="button" data-pos="right" data-nav="#t3-off-canvas" data-effect="<?php echo $this->getParam('addon_offcanvas_effect', 'off-canvas-effect-4') ?>">
<span><?php echo JText::_( 'TPL_MENU' ); ?></span> <i class="fa fa-bars"></i>
</button>
Add the ‘hidden-md hidden-lg’ classes to hide it in medium + Large screen.
Regards