Closely related to the issue of varying monitor resolutions is the question of whether web pages should be designed to be flexible (resizing and adapting to various window sizes) or fixed at a particular size (giving the designer more control of the page's dimensions).
There are very strong opinions on both sides, and there are good reasons for and against each approach, naturally.
You may find that you choose a fixed structure for some sites and allow others to be flexible, or you may have strong convictions that one or the other approach is the only way to go. Either way, it is useful to be familiar with the whole picture and the current opinions of professional web designers. This section attempts to present a balanced overview of the possibilities and the pitfalls.
Web pages are flexible by default. The text and elements in a straightforward HTML file flow into the browser window, filling all available space, regardless of the monitor size. When the browser window is resized, the elements reflow to adapt to the new dimensions. This is the inherent nature of the Web. Designers who are initially traumatized by the unpredictability of where page elements land usually just learn to let go of some control over the page.
Many designers make a conscious decision to construct pages so they can adapt to stretching and shrinking browser windows. This approach comes with advantages and disadvantages.
The advantages of a flexible design include the following:
Keep in mind, though, the following potential pitfalls of a flexible design:
Creating flexible pages
As noted previously, simple HTML files are flexible by default, so you don't need to do anything special to ensure flexibility. However, you can format your page layout and content using relative measurements so that elements resize in proportion to one another.
Tables and frames can be used to give the page a flexible structure. Tables are often used to create columns of text and to divide the page into logical sections. By using relative (percentage) measurements for tables and cells, the table resizes with the browser window; however, the columns and elements remain proportional to one another. For instance, two columns with widths of 25% and 75% always retain those proportions, regardless of the table size.
Frames can also be used to add structure to a flexible design. They, too, can be specified with percentage values or to automatically fill any remaining space in the window. For instance, two frames with widths of 25% and 75% always retain those proportions, regardless of the size of the window in which they are displayed. The contents within each frame flow to fill the frame.
The size of the content (text size, margins, images, etc.) can be set to relative sizes using Cascading Style Sheets. For instance, style sheets allow designers to specify measurements in ems, a unit used in printing to refer to the width of one capital letter "M". On the Web, an em translates to the font size; in other words, an em unit in 12-point text will be 12 points square. Using em measurements for text height, line length, leading, etc. ensures that page elements will scale proportionally with the user's chosen text preference.
If you want more control over the layout of a page, you may opt to design a web page with a fixed width that stays the same for all users, regardless of monitor resolution or browser window size. This approach to web design is based on design principles learned in print, such as constant grid, relationship of page elements, and comfortable line lengths.
These are the advantages of fixed design:
Consider also these disadvantages:
Creating fixed pages
Fixed web page designs are created by putting all the contents of the page in a structural table with absolute measurements specified in pixels. Other tricks, such as sized transparent graphics or Netscape's proprietary <spacer> tag, may also be used to maintain consistent element placement or to hold specific amounts of white space on the page. Cascading Style Sheets also provide ways to set dimensions and placement of web page elements in specific pixel increments.
Some visual HTML authoring tools make it easy to create fixed-width designs. Most notably, Adobe GoLive has an option for laying out your page on a grid as though it were a page-layout program. GoLive then automatically generates the corresponding (and often complicated) table.
Some web sites take advantage of the ultimate in fixed web page design by automatically popping up a new window sized precisely for displaying the contents of the page. The advantage is that all viewers, regardless of their monitor size, see the page in a browser window with the proper dimensions (unless the window is set to a size larger than the monitor resolution). It gives the designer even more control over the presentation of the page.
Of course, web pages need not be all-fixed or all-flexible. It is certainly possible to create pages that are a combination of the two.
One common technique is to create a fixed page layout using a table, but then to center the table on the page so it is more balanced when displayed on large monitors (avoiding the "blank right screen" effect). The drawback to this technique is that when a table is centered, it can no longer be precisely placed over a background image. Some sites use color in the background image to reinforce the columns in a fixed page design, but unfortunately, the background image remains in the same place even when the table is allowed to recenter itself on the screen. (One possible solution is to center the background image using Cascading Style Sheets, but that trick is not universally supported.)
Another approach is to use a table or frameset that consists of a combination of absolute and relative-sized column or frame measurements. With this method, when the window is resized, one column or frame remains the same width while the rest resize and reflow to fill the new available space.
Choosing a Page Size
Obviously, if you decide to design a fixed web page, you need to make a decision regarding which screen size you want it to fit. Common sense dictates that the page should be accessible (and display properly) to the greatest possible number of people.
The idea is to find the most common monitor resolution and design pages that safely fill its live space.
640 x 480 versus 800 × 600
Although finding the most common monitor resolution sounds fairly simple, there remains some controversy over which resolution is the safest. Over the past few years, the number of users with 800 600 monitors or higher has grown substantially, leading many designers to believe that it is perfectly safe to create web pages that fill the 800x600 monitor live space. Other designers disagree, maintaining that 640 x 480 monitor users should still be taken into consideration.
According to TheCounter, the breakdown of users browsing the Web with various monitor resolutions in April 2001 is as follows:
Of course, this is only an approximation based on traffic to a limited set of web sites. The only worthwhile statistics are those culled from your own server logs.
The conventional wisdom
Because approximately 92% of users view web pages at resolutions of 800 600 or higher, professional web designers tend to consider 800 600 to be the standard web page size, as of this writing. More and more commercial web sites are being designed to these specifications. (Very few designers create pages for 1024 768 resolutions or higher.)
However, the low-end 640 480 monitor users are not being written off entirely. Even the small percentage of users with 640 480 monitors translates to millions of viewers.
Again, knowledge of your audience can help you make your design decision. For instance, if you are designing an online resource for graphic designers, you can be certain they will be using 800 600 pixel monitors or higher. An 800-pixel page width is also fairly safe for sites targeting other professional groups because office hardware is more likely to be upgraded regularly. However, if you are designing an educational site to be viewed in schools that may not have the budget for state-of-the-art hardware, the lowest common-denominator 640 480 is a safer bet. The same goes for sites that are likely to be viewed in households, libraries, or other institutions where older hardware setups are still in use.
Remember that it is possible to use HTML and Cascading Style Sheets to design flexible pages that will resize to fit any window size. You don't need to choose one size or another.
If you are designing a site especially for WebTV (with its particularly small window size) or some other display device, you should follow the appropriate guidelines for those devices. And, as always, test your designs in as many monitor configurations as you can get your hands on to see how your page holds up under diverse conditions.
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Web Designing Tutorial
Designing For A Variety Of Browsers
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Structural Html Tags
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Specifying Color In Html
Cascading Style Sheets
Server Side Includes
Designing Graphics With The Web Palette
Audio On The Web
Video On The Web
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Introduction To Smil
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