Canvas size confusion in 2d game - unity3d

I'm doing a 2D game and I'm new in unity.
How should I setup my Canvas for UI or Menu? I Mean what size they should be? Suppose If I add a Canvas with size of 1920x1080, what will happen when I build and run to a device with a resolution much less or higher than that?
Second question: If I force my game to open just Horizontally what will happen to those device which doesn't support changing Orientation?
regards

If you click on Canvas in your hierarchy, you can find a property "Canvas scaler" in the inspector. Change the "UI Scale Mode" to "Scale with Screen Size" and Set "Screen Match Mode" to 0.5

Related

How to scale unity UI for every device

I'm trying to make a level select screen for my game, but when testing the game build the ui isn't scaled that well
I'm currently using the Canvas Scaler with the following settings
These settings give me..interesting results to say the least
What the result is SUPPOSED to be is this
How am I able to do this?
There a few things that you should keep in mind while building the UI for different screens.
Have a target Aspect ratio. Generally it should be 16:9 for landscape and 9:16 for Portrait.
Make sure the reference resolution is in line with your target aspect ratio.
Set the Match option of canvas scalar to 0.5 to scale evenly. If you are sure the device aspect ratio will change in only one direction then set either height or width. For example a portrait game will scale only by height if you switch from 9:16 to 9:18.(0.5 has worked always for me)
Select the aspect ratio in the game window and set the Anchors of the UI to the corner of the UI element. That way Unity will know where the element should be based on Canvas size.
Here is a video that demonstrates it
https://youtu.be/08S1VGL9afg
First of all, use some custom resolution in game view instead of Free Aspect.
Then you could try adjusting Match with Height or width to 0.5.
In some case, you have to adjust custom anchors using these little guys
If you want to absolutely preserve aspects, use this option on Image component.

How would I support different screen sizes, Unity

I'm trying to get it so that my buttons and UI will resize with the screen size that the game is playing in.
How would I do this?
What I have on my canvas:
Firts of all, you have to select on hierarchy the canvas that you want to resize depending the screen size. Then in the inspector you will go to "Canvas scaler" and in UI scale mode you select "Scale with screen size"

UI is shown too small in final (built) game

I'm a newbie to Unity and am learning. I've made my first game which is a simple platformer, along with a main menu. The game also has some text GUI elements. When I run it in Unity's built-in player, the GUI looks fine, but when I build the project and run the game using the .exe, the UI is scaled down.
I'm attaching some screenshots below to clarify this.
(As seen in Unity player)
(As seen in game)
Also, the game UI also looks scaled down:
(As seen in player)
(As seen in game)
I want the in-game UI to be exactly like the one seen in the Unity player.
How do I fix this?
The Canvas can be set to scale with different settings if you want it to be accurate you should choose:
-Scale With Screen Size
Using the Scale With Screen Size mode, positions and sizes can be specified according to the pixels of a specified reference resolution. If the current screen resolution is larger than the reference resolution, the Canvas will keep having only the resolution of the reference resolution, but will scale up in order to fit the screen. If the current screen resolution is smaller than the reference resolution, the Canvas will similarly be scaled down to fit.
1- Go to your Canvas and select the Scale With Screen Size option
2- After that, make sure that the Reference Resolution is the same as the Game Window resolution in your Unity layout, I leave here an example:
As you can see, the resolution set on my Game window is (1024x768) and the reference resolution of the Canvas too.

How to change canvas' size in unity3d

I can not change canvas' size when it's in Screen Space - Overlay Mode; After some research I found that the size of a canvas is determined by your game's screen size. The canvas just covers your screen. So I think I could change my camera's size to change canvas' size. But it does not work. Does anyone know how to set a specific size to a canvas?
So may be my question should be how to change the screen size showed
in editor?
To change the screen size, go to the Game window (accessed by the menu "Window->General->Game"). At the top of the window will be a screen size menu (outlined in green, below) to change the screen size. When pressed, it will display the list of screen sizes that will be emulated. I say "emulated" instead of "displayed" because it is possible to have a screen size larger than the screen on which you are working. It is also possible to zoom into a screen. The "Scale" slider (to the right of the screen size menu) will allow you to scale up/down.
As a note, the list of screens and resolutions shown are related to the current build target (accessed by "File->Build Settings..."). For example, common iOS screen sizes are displayed in the list when the build target is iOS.
Use the Canvas Scaler Component
Unity3D Documentation: Canvas Scaler

Canvas too big for the camera in Unity

I have created a 2D game with an orthogonal camera and using 16:9 display size.
I dragged my background image onto the hierarchy (it's about 2048x1152) and then set the camera size to be 22.5, which made it fit the background perfectly and displays just right.
However, when I add a Canvas for a UI it is absolutely giant, about 100 times bigger. It only becomes 'normal' size with respect everything else added when I set the camera to its default size of 5. So when I add a small graphic, it too becomes giant.
I'm simply following a book I read and I'm not doing anything to deviate.
Am I doing something wrong? Below is what I mean. The background image is the little image in the bottom right and the outlined rectangle is the canvas with a small graphic added.
Thanks.
To force your Hierarchy Canvas UI to the same resolution as the Camera View in your Unity Editor Scene window resolution (i.e. not ridiculously massive), or in other words get the Canvas to fit into the Camera size in the Scene, do the following:
Set the Canvas component's Render Mode to Screen Space - Camera.
Make sure you select or drag the relevant Camera from the Hierarchy to the Render Camera field in the Inspector.
You should use the Unity canvas for this along with the canvas scaler component. If I'm not mistaken it will scale all elements relative to the screen they are viewed on.
The canvas scaler allows you to match the scaling based on a preferred viewport size which is a life saver.
However this may not fit you needs perfectly as it would mean that the background element would become fixed. So if you wanted to pan the element you would need to move it's x and y elements within the canvas.
Hope that helps?