How to increase constants and setup t3editor height in TYPO3 7.6

We recently updated our TYPO3 version from 6.2 to 7.6 and now the t3editor fields are way too small to work with:

They used to be re-sizable but now they are fixed height, that is way too small.

Is there a builtin way to make them re-sizable again?

EDIT: I ended up adding rows and wrap value to typo3/sysext/t3editor/Configuration/TCA/Overrides/sys_templa‌te.php

// Activate t3editor for sys_template constants
if (is_array($GLOBALS['TCA']['sys_template']['columns']['constants']['config'])) {
    $GLOBALS['TCA']['sys_template']['columns']['constants']['config']['renderType'] = 't3editor';
    $GLOBALS['TCA']['sys_template']['columns']['constants']['config']['format'] = 'typoscript';
    $GLOBALS['TCA']['sys_template']['columns']['constants']['config']['rows'] = 20;
    $GLOBALS['TCA']['sys_template']['columns']['constants']['config']['wrap'] = 'ON';
}

// Activate t3editor for sys_template config
if (is_array($GLOBALS['TCA']['sys_template']['columns']['config']['config'])) {
    $GLOBALS['TCA']['sys_template']['columns']['config']['config']['renderType'] = 't3editor';
    $GLOBALS['TCA']['sys_template']['columns']['config']['config']['format'] = 'typoscript';
    $GLOBALS['TCA']['sys_template']['columns']['config']['config']['rows'] = 20;
    $GLOBALS['TCA']['sys_template']['columns']['config']['config']['wrap'] = 'ON';
}

Solution

One alternative may be to override $GLOBALS['TCA'] for the column configurations. You would give new values to cols, rows, or wrap in the sys_template table configuration for the first config (which is the setup textarea), the constants, and the description:

$GLOBALS['TCA']
sys_template
    columns
        config {***setup***}
            config
                cols = 48
                format = typoscript
                renderType = t3editor
                rows = 10
                softref = TStemplate,email[subst],url[subst]
                type = text
                wrap = OFF
            defaultExtras = fix-font : enable-tab
            label = LLL:EXT:frontend/Resources/Private/Language/locallang_tca.xlf:systemplate.config
        constants
            config
                cols = 48
                format = typoscript
                renderType = t3editor
                rows = 10
                softref = TStemplate,email[subst],url[subst]
                type = text
                wrap = OFF
            defaultExtras = fix-font : enable-tab
            label = LLL:EXT:frontend/Resources/Private/Language/locallang_tca.xlf:systemplate.constants
        description
            config
                cols = 48
                rows = 5
                type = text
            defaultExtras = fix-font : enable-tab
            label = LLL:EXT:frontend/Resources/Private/Language/locallang_tca.xlf:systemplate.description

The TCA Reference page for a TEXT-type column gives more information, and the page for storing TCA changes can tell you where to put your changes.