Actually for now we don’t have any limits for the gallery menu styles. In gallery settings we have set op the options to customize menu and use different style customization features. But in the case if you wish to make gallery menu which do not use our build-in styles, but some custom CSS it’s require some code modification and it’s not most easy way.
Most easy way it’s try to use build-in options of the gallery menu to make it’s looks as close as possible to your website styles.
According to limits of the description, No, we don’t have any limits in gallery images description field. Only one point you need to understand that your description size have to be reasonable. Namely long description is more complicated to make looks find on gallery thumbnails.
