ShrinkVertically/Template/config/show.php

<div class="page-header">
    <h2><?= t('Shrink Vertically') ?></h2>
</div>

<form method="post" action="<?= $this->url->href('ConfigController', 'save', array('plugin' => 'ShrinkVertically')) ?>" autocomplete="off">
    <?= $this->form->csrf() ?>

    <fieldset>
        <?= $this->form->label(t('Vertical offset in pixels'), 'shrink_vertically_offset') ?>
        <?= $this->form->number('shrink_vertically_offset', $values, $errors) ?>
        <p class="form-help">
            <?= t('Pixels reserved above and below the vertically collapsed board columns (page header, column header and the horizontal scrollbar). A larger value makes the columns shorter. Default: 240.') ?>
        </p>
    </fieldset>

    <fieldset>
        <?= $this->form->checkbox('shrink_vertically_top_scrollbar', t('Add a top horizontal scrollbar to the board'), 1, isset($values['shrink_vertically_top_scrollbar']) && $values['shrink_vertically_top_scrollbar'] == 1) ?>
        <p class="form-help">
            <?= t('Adds a second horizontal scrollbar above the columns, mirrored with the board scrollbar, so you do not have to scroll to the bottom to move sideways.') ?>
        </p>
    </fieldset>

    <div class="form-actions">
        <button type="submit" class="btn btn-blue"><?= t('Save') ?></button>
    </div>
</form>