# வார்ப்புரு:Overlay/doc

## Template parameters

| image | The image. If not set then only the legend is presented. | Image file name. |  |
| --- | --- | --- | --- |
| width | Width of the image in pixels. Defaults to 500. | Number. |  |
| height | Height of the image in pixels. Defaults to 500. | Number. |  |
| columns | The number of columns to display the legend in. Defaults to 3. Set to 0 to not display any legend. | Number == 0, 1, 2, 3, . . . |  |
| grid | Set to 'yes' to turn on the coordinate grid to allow easier determination of overlay coorindates while editing. Defaults to 'no'. All values other than 'yes' are equivalent to 'no'. |  |  |
| link | Set to 'yes' to turn on default linking of overlay and legend entry. Defaults to 'no'. All values other than 'yes' are equivalent to 'no'. |  |  |
| legendbox | Set to 'no' to turn off a box / around each legend group set of overlays. Defaults to 'yes'. All other values other than 'no' are equivalent to 'yes'. |  |  |
| float | Floats the image and legend. Defaults to centering the image and legend on the page. | Text == , . |  |
| overlay | Determines whether or not the overlays are presented when an image is available. Defaults to 'yes'. All values other than 'no' are equivalent to 'yes'. |  |  |
| Determines whether or not a is placed around the whole presentation. Defaults to 'yes'. All values other than 'no' are equivalent to 'yes'. |  |  |  |
| legend1title | Text for legend1 title. | Optionally linked text. |  |
| legend1start | The number of the first overlay to appear in legend1. Defaults to the first overlay set, otherwise to the previous legend end plus 1 if there is a previous legend. | Number == 1, . ., 30. |  |
| legend1end | The number of the last overlay to appear in legend1. Defaults to the next legend start less 1 if there is a next legend, otherwise to the last set overlay. | Number == 1, . ., 30. |  |
| Both legend starts and legend ends do not need to be provided. Legend starts only, or, legend ends only, for each legend may be provided. |  |  |  |
| overlay1form | The form of the overlays. The default form is an image number, for example, . Other settings allow textual numbers, for example, <span>1</span>, or coloured tags, for example, <span>&nbsp;&nbsp;</span>. Defaults to the previous overlay form, or to 'image' if no previous overlay form. | Text == image, text, colour/color. |  |
| overlay1 | Text for overlay1 for the legend. Defaults to overlay1tip if any. | Text. Do not link. The template will link. |  |
| overlay1colour | Colour of overlay1. Defaults to the previous overlay colour, or to 'red' if no previous overlay colour. | Text == , , . |  |
| overlay1tip | Pop up tool tip text to appear when the screen pointer is over overlay1. Defaults to overlay1. | Text. |  |
| overlay1left | Distance in pixels of the edge of overlay1 from the side of the image. | Number. |  |
| overlay1top | Distance in pixels of the top edge of overlay1 from the top side of the image. | Number. |  |
| overlay1link | Text to be used as a link for the overlay legend text. Defaults to overlay1 if link is not set to no. | Text. Do not link. |  |
| overlay1left1 | The same as overlay1left. | As per overlay1left. |  |
| overlay1top1 | The same as overlay1top. | As per overlay1top. |  |
| overlay1left2 | The ordinate for a second position of overlay1. | As per overlay1left. |  |
| overlay1top2 | The top ordinate for a second position of overlay1. | As per overlay1top. |  |
| overlay1left3 | The ordinate for a third position of overlay1. | As per overlay1left. |  |
| overlay1top3 | The top ordinate for a third position of overlay1. | As per overlay1top. | } |