A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

Size
Tables and figures
Part III. Style 20 spelling

Whenever you can, format tables and figures to fit on one page in normal, or portrait, orientation. If they do not fit, try shortening long column heads or abbreviating repeated terms.

If you cannot make a table or figure fit on a page, you have several options.

Landscape. If a table or figure is too wide for a page, turn it ninety degrees so that the left side is at the bottom of the page; this orientation is called landscape or broadside. Do not put any text on a page containing a landscape table or figure. Set the table title or figure caption in either landscape or portrait orientation. See figure A.13 for an example.

Side by side. If a table is longer than a page but less than half a page wide, divide it in half and position the two parts side by side on the same page. Include the column heads on both parts.

Multiple pages. If a table or figure is too long to fit on a single page in portrait orientation or too wide to fit in landscape, divide it between two (or more) pages. For tables, repeat the stub column and all column heads (see 26.2) on every page. Put the table number on a “continued” line at the top left of every page after the first, flush left, in italic letters (Table 2 continued). Omit the bottom rule on all pages except the last.

Reduction. If the figure is a photograph or other image, consider reducing it. Consult your local guidelines for information about resolution and related characteristics.

Separate items. If none of the above solutions is appropriate, consider presenting the data in two or more separate tables or figures.

Supplement. If the table or figure consists of material that cannot be presented in print form, such as a large data set or a multimedia file, treat it as an appendix, as described in A.2.3.