Start in edit mode of the page or blog
Click on the "+" at the top of the page
Find "Flowchart" from the drop down list or click "View more"
Search for Flowchart in the search bar
The Insert Flowchart dialog will be opened
Write a valid textual representation in the macro body
Click "Save"
Save the page and see the result
Visit https://github.com/adrai/flowchart.js to learn more about Flowchart syntax!