Reports are most often used to display insightful data and results for your business, a campaign, or an event at a particular time period. They are great for prints as well!
For Report templates, there is no semi-transparent line to adjust the height at the end of the block, so you'll have to use the Settings tab on each block's left border for this.
If you change one block to be A4, for example, or if you change one block to be 800 px to 600 px, the size set will apply to ALL blocks.
Are there any templates available for resumes/CVs?
You will be able to find CVs or resume templates available under the Posters layout templates.