Do not put spaces between parameters. The other parameters are optional and can be placed in any order. Some infoboxes do not require the brackets. Keep parameters in lower case. The other parameters are:
Type
'thumb' / 'thumbnail' or 'frame'. This causes image to be displayed with specific formatting. "thumb" is normally preferred.
Location
'right', 'left', 'center' or 'none'. Determines placement of the image on the page. "Left" or "right" is the norm, but large panoramas or timelines can be displayed in the center.
Size
{width}px or {width}x{height}px (e.g. 50x40px, would limit width to 50 pixels and height to 40 pixels). Normally only one variable is used. Use common sense when determining the sizes; you can use the "Show preview" button if you need to. If thumb or thumbnail is chosen, size should normally be left out, so that the size defaults to the size set in a user's preferences.
alt=
(keep it lower case). This is the "alternate image" parameter used to describe the image for screenreaders or for people with low-vision. It should be more descriptive than the caption alone. Do not use this for another copy of the caption or of the article title, as the reader will already be aware of these.
Caption
Any element which cannot be identified as one of the above is automatically treated as caption text. It is traditional to put this last. The caption should identify what the image is, and ideally be a complete sentence that adds to the article by pointing out something a casual reader would not have noticed otherwise, or add information the pertains to the image. Full sentence or multi fragment captions require full stop punctuation.
If you have created a picture that is not already in Wikipedia's image collection on the Commons that you want to include in an article, you will need to upload it first. Bonus tip: Similar formatting is used to insert basic audio or basic video clips into articles.
For boldly changing the AfD page to help keep articles out of AfD that don't belong in AfD. CelarnorTalk to me 18:43, 9 April 2008 (UTC)
The Original Barnstar
For your constant, very helpful guidance that resulted in GA on the wood turtle. Thank you.--NYMFan69-86 (talk) 11:45, 25 May 2010 (UTC)
The Mistagged BLP Cleanup Barnstar
This barnstar does not cite any references or sources.[1][2][3] For your work with mistagged BLPs, thank you! The list is now empty with your help. Gigs (talk) 05:42, 22 December 2010 (UTC)
The Invisible Barnstar
Your work about chess is well-known but this is the right Barnstar for your comments about how to help newcomers. Philcha (talk) 17:43, 26 May 2010 (UTC)
The Random Acts of Kindness Barnstar
For helping me out an uncountable number of times over the past year. You are an exceptional editor of the wiki! NYMFan69-86 (talk) 02:16, 4 December 2010 (UTC)
The Working Man's Barnstar
For your impressive work of assessment in Wikipedia talk:WikiProject Chess/Review on B+, B and B- assessments, I am very pleased to award you this barnstar. SyG (talk) 20:29, 7 March 2008 (UTC)
The Reviewers Award
A big thanks to your constant efforts on making the loggerhead sea turtle a better article. You made it possible for us to get FA! --TimHAllstr (talk) 00:40, 7 June 2010 (UTC)
The Reviewers Award
For all your help with Painted turtle. You truly are an exceptional collaborator. One who embodies the wiki spirit. Thank you, NYMFan69-86 (talk) 18:07, 24 January 2011 (UTC)
The Reviewers Award
Thank you for your diligent efforts to bring the loggerhead sea turtle to FA. We couldn't have done it without your help. Vancemiller (talk·contribs·count·email) 00:59, 5 June 2010 (UTC)
The Invisible Barnstar
When I saw "Awarded to users who make significant and helpful contributions [...] without seeking recognition or reward for their work," I thought of you. Truly phenomenal and tireless work over at Wikipedia:WikiProject Turtles, which would be nowhere without you SunCreator. NYMFan69-86 (talk) 00:59, 15 January 2011 (UTC)