add text or other images under the post page (homepage)

hey
im using the pictorico and i edited some stuff using the jetpack in edit CSS. I would like to ask if i can add some text on my post page, coz everything im adding is going as a pic on the theme.
please note that i need the grid to stay plus i want to add text under the thumbnails.
Kindly help me in this your help is appreciated
thank you

[please don’t bump]