Each individual report will have a set of filters included in it. These can be found above the visuals of individual report:

Two of the most used filters within the reports are: 

Drop down box: requires you to select one of the pre-set options.

Range slider: allows you yo set brackets of the range to be shown.

Please feel free to review the Landscape User Guide General Functionality presentation slides, which look at the  navigation and tools in more detail.

For more detailed instructions on how to set filters using the Filters pane, please visit https://docs.microsoft.com/en-us/power-bi/consumer/end-user-report-filter