You can mark the job titles in bold by clicking on the paint palette next to the section "Work experience". Here you must click on "Individual", then on "Job title" and hereafter on the ‘B’ under ‘Text decoration’.

By marking the job titles in bold, you make it easier for the recruiter to read across the various job titles in your CV. Having marked the job titles in bold, the same must be done for the other sections such as e.g. “Education”.