While not a standard feature of topographic maps, for bushwalking purposes it can be very useful to be able to see slopes. If styled correctly, they can give an excellent primitive representation of cliffs in the area, enabling identification of possible passes and canyons.

Use the Raster Terrain Analysis → Slope tool in the Processing Toolbox, either on the DEM or the depressionless DEM.

It can be styled using a gradient style to aid in identification of passable/impassable areas.