Dimensions and content of the objectmanager balloon in Yandex maps?

Question

Yandex maps

Help me figure it out, you need to create a balloon of the following form:
- when clustering in the left field of the thumbnail with a list and a scroll bar, when you select a certain image in the right field, a picture appears that leads further by the link,
there is a code:
ymaps.ready (init);
function init () {
var myMap = new ymaps.Map('map', {
center: [52.826716, 107.832781],
zoom: 8,
controls: []
}, {
searchControlProvider: 'yandex#search'
}),
objectManager = new ymaps.ObjectManager({
// Set the option to start clustering the labels.
clusterize: true,
// ObjectManager accepts the same options as the clusterer.
gridSize: 32,
clusterDisableClickZoom: true,
clusterBalloonMaxWidth: 290,
clusterBalloonMaxHeight: 300,
clusterBalloonContentLayoutWidth: 255,
clusterBalloonLeftColumnWidth: 70,
});
// To set options for single objects and clusters,
// refer to the child collections of the ObjectManager.
objectManager.objects.options.set('preset', 'islands#greenDotIcon');
objectManager.clusters.options.set('preset', 'islands#greenClusterIcons');
myMap.geoObjects.add(objectManager);
$.ajax({
url: "js/data_map.json"
}).done(function(data) {
objectManager.add(data);
});
}
json content like this:
{
"type": "FeatureCollection",
"features": [
{"type": "Feature", "id": 88, "geometry": {"type": "Point", "coordinates ": [52.884167, 108.112778]}, "properties": {"balloonContentBody": " ", "clusterCaption": " "}},
{"type": "Feature", "id": 125, "geometry": { "type": "Point", "coordinates": [51.639287, 105.543242]}, "properties":

How can I remove the thumbnail from the right margin, leaving only the large image?
How can I adjust the height of blocks (layers)? An attempt to put a crutch in the form of a style:
{"type": "Feature", "id": 125, "geometry": {"type": "Point", "coordinates": [51.639287, 105.543242]}, "properties": {"balloonContentBody": " ", "clusterCaption": " "}}
failed, got a scrollbar on the right...
I don't understand anything in javascript and literally a bit of html :)