In the early, representational phase Markus Jenzer devoted himself almost exclusively to landscape painting. Inspired by Impressionism, in the early 70s he escaped from what he had learned previously. In the bright landscapes of the South (Provence, Tuscany), accompanied by one of his former teachers, Franco Mazzoni, he found the breakthrough to his own way of painting. The bright colours and upbeat ease of his brushstrokes dominated his work from then on.
In the 70s and 80s Markus Jenzer was primarily known and valued as a landscape painter. During this period he produced around 400 pictures which he presented at numerous exhibitions . Many of them show landscapes in Switzerland, others emerged from his travels in Southern Europe.