Hello,
a) This is a bug that will be fixed in an upcoming version of the theme. Use this CSS as a temporary fix:
.geodir-tabs dl.geodir-tab-head{display: block!important;}
b) It is not possible to change the placeholder without a customization. It is not a default, but a placeholder to encourage users to change the value.
1) Custom fields are added as shown here: https://wpgeodirectory.com/docs-v2/places/custom/
2) Hide the supereme featured image with this CSS
header .featured-area .featured-img {
background-image: none!important;
}
3) Edit the home page to remove theGD Map shortcode from the content area.
4) To remove the excerpt from the Archive item shown in the GD Listings element you will need to edit the GD Archive item template. Remove the GD Post Content shortcode from the template.
https://wpgeodirectory.com/docs-v2/templates/archive-item
5) You can find examples here for CSS to hide various items on the supreme details page:
https://wpgeodirectory.com/docs-v2/themes/supreme/
The customizer has an option to adjust the font size for the site.
Additional common examples for CSS are found on this page:
https://wpgeodirectory.com/docs-v2/faq/common-examples/
6) If you did not enter that, it could be a conflict with a theme editor or builder on your site. Try disabling plugins to see if it persists.
7) Author box options are in UsersWP. You can turn it off there or adjust it with your own custom CSS.
8) Use GD Listings to display your listings, and set the sort to Add Date. First configure a sort by add date.
https://wpgeodirectory.com/docs-v2/places/sorting/
Once you configure the sort, you can then select it in the GD Listings.
Make sure to use the shortcode builder to create the GD listings shortcode.
https://wpgeodirectory.com/docs-v2/geodirectory/shortcode-builder/
9) Use the GD Endpoints
https://wpgeodirectory.com/docs-v2/geodirectory/navigation/
10) That looks related to the builder and your host. Are you running cache on the backend. Try disabling plugins to see if there is a conflict.
11) Unfortunately this is not possible.
12) You can use custom CSS ont he examples page to hide search bar fields. Use page body classes like body.home to hide fields on a particular page.
https://wpgeodirectory.com/docs/customizing-your-style/
https://wpgeodirectory.com/docs-v2/faq/common-examples/