[ ] Add a new file i_mi_computational_grid.rst, titled "Computational grid", which should be available under "3Di Modeller Interface", in between "Modelling" and "Simulating"
[ ] Describe that the computational grid in the 3Di Modeller Interface is an export the most important data from the gridadmin.h5 file
[ ] Refer to the ways in which it can be created; this has already been described elsewhere, just refer to the right pages.
[ ] Mention that is is meant for viewing only, you cannot edit it directly.
[ ] Header for each layer (Node, Cell, etc); short description of the layer + table of the names and description of the attributes (and, if applicable, the meaning of the attribute values)
Some of this information is available in the threedigrid documentation
Some of this information is available in the threedigrid documentation