Use the filter buttons 01..15 to apply the appropriate defined filter.
left mouse-button
With click the left mouse-button the filtering gets switched on. A further click will switch off the filtering again.
right mouse-button
With right mouse-button click the cursor jumps to the next result line. In order to jump to the previous result line press the 'Shift' key and click the right mouse button.
Note: this functionality is dependent on where the filter-tool bar is currently docked, i.e. jumping within the log-file window or within the filter-result window