Hey innovatetaos,
first of all, thank you for using Ikebana!
You can import demo content from the file included with the theme – please follow the instructions in the “Importing Demo Content” section of the Manual (page 13). After that, you can set up a portfolio masonry page using the demo content – please see section “Portfolio” on pp 4-7 of the theme manual for an illustrated guide on how to achieve that. In case you encounter any difficulties or have questions along the way, do not hesitate to contact me.
Sincerely,
Andrii / Satori Studio