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# PAW control tags

There are a few tags that control the behavior of the PAW implementation. The first one is LMAXPAW=l. This flag sets the maximum l-quantum number for the evaluation of the on-site terms on the radial support grids in the PAW method. The default for LMAXPAW is ${\displaystyle 2*l_{{max}}}$, where ${\displaystyle l_{{max}}}$ is the maximum angular quantum number of the partial waves. A useful setting for this tag is for instance LMAXPAW=0. In this case, only spherical terms are evaluated on the radial grid. This does not mean that a-spherical terms are totally neglected, because the compensation charges are always expanded up to ${\displaystyle 2*l_{{max}}}$ on the plane wave grid.