Update zooms.rst

Update missing functionalities with zooms

source/zooms.rst

@@ -407,16 +407,17 @@ parcels being able to transit from one grid to another, which has not been imple
 The missing functionalities are grouped in the table below according to their use on the 
 root or on the child grid.
 
-============================================  =====  ======
-  Option name (and flag)                          Grid
---------------------------------------------  -------------
+============================================  =====  ======  ===========
+  Option name (and flag)                          Grid        avail. in 
+--------------------------------------------  -------------  -----------
 \                                              Root   Child
-============================================  =====  ======
+============================================  =====  ======  ===========
 Timing (``ln_timing=T``)                        No
-Icebergs(``ln_icebergs=T``)                     No
-Floats(``ln_floats=T``)                         No
+Icebergs (``ln_icebergs=T``)                    No
+Under ice cavities (``ln_isf=T``)               No     No
+Floats (``ln_floats=T``)                        No
 Stochastic param. (``ln_sto_XXX=T``)            No
-Global volume ctl (``nn_fwb=1/2``)              No
+Global volume ctl (``nn_fwb=1/2``)              No              main
 Open boundaries (``ln_bdy=T``)                 Yes     No
 Global heat and sal budgets (``ln_diahsb``)     No
-============================================  =====  ======
+============================================  =====  ======  ===========