btcpayserver/BTCPayServer/Views/Server/Theme.cshtml

@model BTCPayServer.Services.ThemeSettings
@{
    ViewData.SetActivePageAndTitle(ServerNavPages.Theme);
}


<partial name="_StatusMessage" />
<div class="row">
    <div class="col-lg-6">
        <div asp-validation-summary="All" class="text-danger"></div>
    </div>
</div>
<div class="row">
    <div class="col-lg-6">
        <form method="post">
            <div class="form-group">
                <label asp-for="BootstrapCssUri"></label>
                <a href="https://docs.btcpayserver.org/development/theme#bootstrap-themes" target="_blank"><span class="fa fa-question-circle-o" title="More information..."></span></a>
                <input asp-for="BootstrapCssUri" class="form-control" />
                <span asp-validation-for="BootstrapCssUri" class="text-danger"></span>
                <p class="form-text text-muted">
                    <a href="https://bootstrap.build/app/v4.0/" target="_blank">Build your own theme</a>
                    or <a href="https://bootswatch.com/" target="_blank">pick one already made</a>
                </p>
            </div>
            <div class="form-group">
                <label asp-for="CreativeStartCssUri"></label>
                <input asp-for="CreativeStartCssUri" class="form-control" />
                <span asp-validation-for="CreativeStartCssUri" class="text-danger"></span>
                <p class="form-text text-muted">
                    <a href="https://startbootstrap.com/template-overviews/creative/" target="_blank">Creative Start theme</a>
                    is used on top of Bootstrap
                </p>
            </div>
            <div class="form-group">
                <label asp-for="ThemeCssUri"></label>
                <select id=themes asp-for="ThemeCssUri" class="form-control">
                    <option value="/css/themes/classic.css">Classic</option>
                    <option value="/css/themes/modern.css">Modern</option>
                </select>
                <span asp-validation-for="ThemeCssUri" class="text-danger"></span>
            </div>
            <button type="submit" class="btn btn-primary" name="command" value="Save">Save</button>
        </form>
    </div>
</div>

@section Scripts {
    @await Html.PartialAsync("_ValidationScriptsPartial")
}