User:Zyxw/upright

The available values for thumbnail size in Special:Preferences (on the Appearance tab) are 120px, 150px, 180px, 200px, 220px (default), 250px, 300px, and 400px. As explained at Wikipedia:Extended image syntax § Size, upright=Factor will "adjust a thumbnail's size to Factor times the default thumbnail size, rounding the result to the nearest multiple of 10". That math can be done on Wikipedia via {{#expr: SIZE * FACTOR round -1}}, which is how the following chart was generated.

Effects of upright on image widths available in user preferences

	upright=0.6	upright=0.75 upright (default)	upright=0.9	upright=1 (no change)	upright=1.1	upright=1.2	upright=1.35	upright=1.8
120px	70px	90px	110px	120px	130px	140px	160px	220px
150px	90px	110px	140px	150px	170px	180px	200px	270px
180px	110px	140px	160px	180px	200px	220px	240px	320px
200px	120px	150px	180px	200px	220px	240px	270px	360px
220px (default)	130px	170px	200px	220px	240px	260px	300px	400px
250px	150px	190px	230px	250px	280px	300px	340px	450px
300px	180px	230px	270px	300px	330px	360px	410px	540px
400px	240px	300px	360px	400px	440px	480px	540px	720px

Examples

Actual effects

The first column of the following table shows a frameless image at the user's current thumbnail size setting (220px for users who have not changed it or are not logged in). The second column shows the same frameless image with upright or upright=value added.

To see the actual effect at other thumbnail sizes, change the setting in Special:Preferences (on the Appearance tab), come back to this page, and either refresh it or click . View the HTML source via the web browser to confirm the actual sizes in the image tags.

Note: As shown in the first three rows, upright, upright=0, and upright=0.75 all have the same effect.

Effect of upright on user's current thumbnail size in preferences

[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright]]
[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright=0]]
[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright=0.75]]
[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright=0.9]]
[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright=1]]
[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright=1.2]]
[[File:Apple.jpg|frameless]]	[[File:Apple.jpg|frameless|upright=1.35]]

Simulated effects

This first column of the following table shows an image at each of the thumbnail size settings available in Special:Preferences (400px was not included due to its effect on the table and page width). The second column shows simulated examples of how upright=1.35 would change each of those thumbnail sizes (the math used is shown in the heading above each adjusted image).

Simulated effect of upright=1.35 on thumbnail sizes available in preferences (excluding 400px)

width: 120px	120 * 1.35 round -1 = 160px
width: 150px	150 * 1.35 round -1 = 200px
width: 180px	180 * 1.35 round -1 = 240px
width: 200px	200 * 1.35 round -1 = 270px
width: 220px (default)	220 * 1.35 round -1 = 300px
width: 250px	250 * 1.35 round -1 = 340px
width: 300px	300 * 1.35 round -1 = 410px