By clicking on Create, your pattern has been calculated and created starting from your base pattern; now, however, it is necessary to set some parameters such as a name (to find it among the samples), the type of structure and repetition, etc. All you can do from the panel that has opened to you on the left is Pattern Options. Setting these parameters allows very different effects; the structure of the repetition determines the type of pattern that will be created: you can choose between grid, brick by row, brick by column, hexagonal, etc. - see example photo.
As you may have noticed at this point, the modification of these settings from the Pattern Options panel is done in real-time on the pattern preview. The panel also allows you to choose the size (width and height) of the matrix's spacing and manage their overlap.
In short, this is the phase in which you have to experiment with the different parameters of the panel to get the result you are looking for. Remember, however, that in addition to the option settings, you can always act on the original base motif, moving or resizing the elements, rather than changing their stroke or fill colour.