Q:

Images appear to not scale up with the size of the screen

I have created a centered layout. But it does not scale images up to device's dpi. How to make them bigger as device screen? Also how to scale them even in editor? Cause I can't. They are always this size. 
Here is an example of ImageButton code:
    <ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:srcCompat="@drawable/broadcasts"
    android:background="?android:selectableItemBackground"
    android:onClick="onWipButton_Click"
    android:layout_marginRight="30dp"
    android:layout_marginEnd="30dp"
    android:id="@+id/imageButton2"
    android:adjustViewBounds="true"
    android:cropToPadding="false"
    android:scaleType="fitXY"
    android:layout_above="@+id/textView5"
    android:layout_toLeftOf="@+id/textView5"
    android:layout_toStartOf="@+id/textView5" />

Folder structure with all dpi.

On device with high dpi.

Design mode in studio.

A:

I'm assuming you have actually do have assets of different sizes in those resource folders at zoom levels of 1x, 1.5x, 2x, 3x, 4x for m, h, xh, xxh, xxxh.
Then understand that devices are not fixed width either physically or in terms of dps. So while it may be correctly picking the correct resource for the resolution of the screen, that does not mean it will take up the same % of available width on every device. It should just be roughly the same physical size if measure with a ruler (roughly the same mind you).
In the designer, pick a screen with the same width and DPI. You should see the issue at design time.
If you want larger images, providing larger assets would be the simplest solution, and won't make blurry scaled images.
Then if you want the larger images only for larger screens, you could provide the larger assets in a drawable folder for large screens:
res/drawable-mdpi/
res/drawable-sw600dp-mdpi/
res/drawable-hdpi/
res/drawable-sw600dp-hdpi/
etc.

sw600dp is a "smallest width" qualifier, meaning it applies when the device has at least 600dp width available to it. This is a commonly used number to distinguish devices, it's what used to be known as a large screen. If you want to support different assets for 10" tablets, you might also use sw720.
Please see here for more info on the screen size resource folder qualifiers: https://developer.android.com/guide/practices/screens_support.html#NewQualifiers

