How to link metafield to the block of "image collage"in product page

[MattLo]

I have created metafield in product category, however, i cannot find it when i try to link the metafield into the block section of "Image Collage" in product page, Please help, thx, I am using Dawn theme. 

In the screenshot, it show that there are absence of the metafields that I created. thx

[Reena_Soni]

Hi @MattLo,
Please check if this two are enabled.

 

[MattLo]

yes, but i still cant find my metafield for selection