Update "Size and anchors" to reflect Godot 4.3 terminology (#10216)

Changed relevant occurences of margin with "anchor offset" or "offset".

Also reworded paragraph about aspect ratios, as it included information that may not necessarily be correct.

Also replaced images with newer versions.

tutorials/ui/size_and_anchors.rst

@@ -1,4 +1,3 @@
-:article_outdated: True
 
 .. _doc_size_and_anchors:
 
@@ -10,58 +9,62 @@ resolution, positioning controls would be a simple matter of setting the
 position and size of each one of them. Unfortunately, that is rarely the
 case.
 
-Only TVs nowadays have a standard resolution and aspect ratio.
-Everything else, from computer monitors to tablets, portable consoles
-and mobile phones have different resolutions and aspect ratios.
+While some configurations may be more common than others, devices like 
+phones, tablets and portable gaming consoles can vary greatly. Therefore, 
+we often have to account for different aspect ratios, resolutions and user 
+scaling.
 
-There are several ways to handle this, but for now, let's just imagine
+There are several ways to account for this, but for now, let's just imagine
 that the screen resolution has changed and the controls need to be
 re-positioned. Some will need to follow the bottom of the screen, others
 the top of the screen, or maybe the right or left margins.
 
 .. image:: img/anchors.png
 
-This is done by editing the *margin* properties of controls. Each
-control has four margins: left, right, bottom, and top, which correspond
+This is done by editing the *anchor offsets* of controls, which behave similar
+to a margin. To access these settings, you will first need to select the *Custom* 
+anchor preset.
+
+Each control has four anchor offsets: left, right, bottom, and top, which correspond
 to the respective edges of the control. By default, all of
 them represent a distance in pixels relative to the top-left corner of
 the parent control or (in case there is no parent control) the viewport.
 
-.. image:: img/margin.png
+.. image:: img/offset.webp
 
-So to make the control wider you can make the right margin larger and/or
-make the left margin smaller. This lets you set the exact placement
+So to make the control wider you can make the right offset larger and/or
+make the left offset smaller. This lets you set the exact placement
 and shape of the control.
 
-The *anchor* properties adjust where the margin distances are relative *to*.
-Each margin has an individual anchor that can be adjusted from the
+The *anchor* properties adjust where the offsets are relative *to*.
+Each offset has an individual anchor that can be adjusted from the
 beginning to the end of the parent. So the vertical (top, bottom) anchors
-adjust from 0 (top of parent) to 1.0 (bottom of parent) with 0.5 being
-the center, and the control margins will be placed relative to that
+adjust from ``0.0`` (top of parent) to ``1.0`` (bottom of parent) with ``0.5`` being
+the center, and the control offsets will be placed relative to that
 point. The horizontal (left, right) anchors similarly adjust from left to
 right of the parent.
 
 Note that when you wish the edge of a control to be above or left of the
-anchor point, you must change the margin value to be negative.
+anchor point, you must change the offset value to be negative.
 
-For example: when horizontal anchors are changed to 1, the margin values
+For example: when horizontal anchors are changed to ``1.0``, the offset values
 become relative to the top-right corner of the parent control or viewport.
 
-.. image:: img/marginend.png
+.. image:: img/offset_end.webp
 
 Adjusting the two horizontal or the two vertical anchors to different
 values will make the control change size when the parent control does.
 Here, the control is set to anchor its bottom-right corner to the
-parent's bottom-right, while the top-left control margins are still
+parent's bottom-right, while the top-left control offsets are still
 anchored to the top-left of the parent, so when re-sizing the parent,
-the control will always cover it, leaving a 20 pixel margin:
+the control will always cover it, leaving a 20 pixel offset:
 
-.. image:: img/marginaround.png
+.. image:: img/offset_around.webp
 
 Centering a control
 -------------------
 
-To center a control in its parent, set its anchors to 0.5 and each margin
+To center a control in its parent, set its anchors to ``0.5`` and each offset
 to half of its relevant dimension. For example, the code below shows how
 a TextureRect can be centered in its parent:
 
@@ -99,15 +102,15 @@ a TextureRect can be centered in its parent:
     rect.OffsetBottom = textureSize.Y / 2;
     AddChild(rect);
 
-Setting each anchor to 0.5 moves the reference point for the margins to
-the center of its parent. From there, we set negative margins so that
+Setting each anchor to ``0.5`` moves the reference point for the offsets to
+the center of its parent. From there, we set negative offsets so that
 the control gets its natural size.
 
-Layout Presets
+Anchor Presets
 --------------
 
-Instead of manually adjusting the margin and anchor values, you can use the
-toolbar's Layout menu, above the viewport. Besides centering, it gives you many
+Instead of manually adjusting the offset and anchor values, you can use the
+toolbar's Anchor menu, above the viewport. Besides centering, it gives you many
 options to align and resize control nodes.
 
-.. image:: img/layout_dropdown_menu.png
+.. image:: img/anchor_presets.webp