Use left and right arrow to change slide in that direction whenever canvas is selected.
Slide 1
Pine stump

Sample:

Stump of Pinus sylvestris (pine) in Sipoo, Finland, EU.

Credit: Ronja Addams-Moring (2007) CC BY-SA 3.0.

View source.

Growth rings (species unknown)

Sample:

Growth rings

Credit: Biswarup Ganguly (2011) CC BY 3.0.

View source.

(Species unknown)

Slide 1 of 5