Hi, Andres

- Thank you for reaching out to us.

We can see that you found a couple of things that we can work on improving, thank you for that.

We appreciate every suggestion that can help improve our plugin.

- Just to make sure I understood correctly, regarding the first issue, you mean the style of this filter selectbox, when there is nothing selected, correct?

- So far, we have made 6 skins. The first three in the selection ( Graphite, Material, Light) all have a borderless design,

and the last three, Aqua, Purple, and Dark, have identically looking filter boxes, with borders, 

so I am not sure if I understood, you said that only Purple has something different than the others?

-

that's the purple one;

-

Aqua;

-

and the Dark skin. They all have the same CSS properties for the border, and size, just the Dark one has a different colour.

There are some custom CSS styles we can give you, and you can experiment, change the styles until you find what you need. For example, this can affect the borders on the filter boxes. I added these styles on the Light skin:

.wpdt-c .wpDataTablesWrapper .filter_column button {
    border-radius: 4px;
    border: solid 1px #dcdfe6;
    padding-left: 15px;
    width: 100%;
}
.wpDataTableFilterBox .wpDataTableFilterSection .wdt-select-filter input.text_filter,
.wpDataTablesWrapper .wpDataTableFilterBox .wpDataTableFilterSection input.text_filter {
    border-radius: 4px;
    border: solid 1px #dcdfe6;
    padding-left: 15px;
    width: 100%;
}
.wpdt-c .form-control:not(.fc-alt) {
    border-radius: 4px;
    border: solid 1px #dcdfe6;
    padding-left: 15px;
    width: 100%;
}

and the result is like this, all the filter boxes on Light skin can have borders:

So, adding some CSS styles can make the difference, but if I understand, you would like this to be "by default" on the skins? If I didn't understand correctly, please write more details about that.

2. 

Would you like us to implement a built-in setting that will allow changing the header font size?

Here is how you can do it with custom CSS, add these styles to the customize section :

.wpDataTablesWrapper table.wpDataTable > thead > tr > th {
    font-size: x-large;
}

This will allow you to change any font properties, or any text property on the header text. I made it extra large just to see the difference on my dummy table:

3.

I am sorry, can you describe what would the (i) boxes do on the columns?

-

You can create all these suggestions for built-in features on this link https://wpdatatables.com/documentation/feature-suggestion/ and our developers would place it on their "TO-DO" list.

As more customers request a feature, it gets pushed quicker on the list. We always strive to make our product better and deliver the most value to our end users, so we carefully review each suggestion.