Hey guys, how are you?

So we are setting up a Radio system integrated with videos on our website.
Where the same on FM is playing the song and on the website the synchronized music clip is playing.

Here we use Pulsar Multimedia (https://www.youtube.com/watch?v=P5SKl1ynBA8)

The question and help is as follows. When the name of the song appears in vMix it is not in the same size as the GC, I noticed that the radio in another state has the same system. however with GT Title automatic (https://imgur.com/a/0ll86or)

Image from my vMix video (https://imgur.com/a/du9wveA) The GC does not fit with the text.

NOTE: I contacted radio program support and they told me that this is a configuration of vMix itself.
I also tried to contact the radio, but they don't respond (as it's a fight between the stations for competition)

I saw this post, but that's not it.

I would like to know how the GC image automatically becomes the same size as the text, as there are artists who play on the radio station with a big name and have just been shown on the GC image.