I need to achieve something like this. This is a full width menu under the header. Any suggestions?
There is no easy way to do this. You can try detecting the cell dimensions using the internal dp.nav.main property which stores the DOM parent of grid cells.
dp.nav.main
How can i anchor it to the cell? if i scrol the menu stays right there
As I mentioned, this is not easy to do. Placing a custom element deep inside the Scheduler DOM structure is not safe as it may break things. Some elements are also cleared regularly.