abc

If you search for and, you will find:

Déjà Vu X3 now allows you to mark the project's segments in three different ways: Translated, Proofread and Approved. These new segments statuses make it easier to proofread and perform QA checks on the project by allowing translators, proofreaders and project managers to know what level of scrutiny has been applied to each segment at a glance, as each of these statuses is denoted by a specific color.

a?

If you search for segments?, you will find:

Déjà Vu X3 now allows you to mark the project's segments in three different ways: Translated, Proofread and Approved. These new segments statuses make it easier to proofread and perform QA checks on the project by allowing translators, proofreaders and project managers to know what level of scrutiny has been applied to each segment at a glance, as each of these statuses is denoted by a specific color.

So, you find all instances of the word segment, with and without an s at the end.

a*

If you search for 10*, you will find:

There is 1 marble in each jar, and there are 10 jars in each basket, and 100 baskets in each truck, and 1000 trucks parked in each warehouse, and there are 10000 warehouses, so there are 10000000000 marbles in total.

This finds any number that begins with 1, and is followed by any number of zeros, or none at all.

a+

If you search for ee+, you will find:

Some of theesee words haveee too many e's in theeeem.

This way, you find groups of 2 or more letters e, but you ignore all instance of a single e. You could use this to replace them all with a single letter e, for example.

a{3}

If you search for a{3}, you will find:

It matches aaa, but not aa, or even a. It will match part of aaaa and aaaaa, so be careful.

As you may suspect, looking for a{3} is exactly the same as looking for aaa.

a{3,}

If you search for b{3,}, you will find:

This will match bbb, and bbbb, and bbbbbbbbbbbbbbbbbb even. It will not match bb, or just b.

Looking for b{1,} is, indeed, the same as looking for b+.

a{3,6}

If you search for c{3,6}, you will find:

This will match ccc, cccc, ccccc and cccccc, but it does not match cc or c. However, this will only match part of cccccccc, so be careful.

.

If you search for c.t, you will find:

Since the . matches any letter at all, this will find cat, cet, cit, cot and cut. It only matches 1 letter, so it won't find something like coot.

\d

If you search for \d, you will find:

This matches any number, so it matches 1, 2, 3, 4, 5, 6, 7, 8, and 9.

This only matches one digit, so if you have a number with several digits, the Search dialog will find each digit separately. If you want to find numbers with one of more digits, search for \d+.

\D

If you search for \D, you will find:

1a2b3c4d

This is the opposite of \d, and allows you to find characters that are not numbers.

\s

If you search for \s, you will find:

This matches spaces, non-breaking spaces, tabs, and generally anything that shows up as space between letters when you see text.
It even matches line breaks, as you can see at the end of the previous sentence.

\S

If you search for \S, you will find:

This will find anything that is not a space, a tab, a linebreak, etc.

This only matches one non-whitespace character, so if you use it by itself, the Search dialog will find each letter in the text separately.

[]

Searching for [a] is the same as searching for a:

Déjà Vu X3 now allows you to mark the project's segments in three different ways: Translated, Proofread and Approved.

You can use this to search for several different characters at once, e.g. [Tc1]:

This will find upper- case T's, lower- case c's, and the number 1.

You can specify ranges of characters you want to search for, e.g. [a-z]:

This finds any character in the range a-z, in other words, any lower case character.

If you search for [A-Z], you will find:

This finds characters in the range A to Z, or the upper-case ones.

You can combine these features to make more complex searches, e.g. [a-dA-G1-5], you will find:

This finds any letter between a and d, any letter between A and G, and any digit between 1 and 5.

^

If you search for ^, you will find:

This only matches the start or a line.
Like the start of this line and the previous one.

If you search for ^T, you will find:

This will only match a capital T that is at the beginning of a line.

$

If you search for $, you will find:

This matches the end of line, like this one.

If you search for a$, you will find:

This will match the letter a, but only if it is at the end of the line, like this: a

(...)

You can use the normal brackets to group and separate parts of your Regex from other, in a manner similar to how you use brackets in mathematical expressions. So, if you search for (abc)+, you will find:

abc, abbc, abcc, abcabc, aabbcc.

This is not the same as abc+:

abc, abbc, abcc, abcabc, aabbcc.

Nor is it the same as a+b+c+, nor [abc]+:

abc, abbc, abcc, abcabc, aabbcc.

a|b

If you search for 1|2, you will find:

This will find the number 1, or the number 2.

To see the difference, consider what happens if you search for 12:

This will find the number 1 and the number 2, together in that order. So, it will find 12.

\w

If you search for \w, you will find:

This matches letters, numbers 123 and underscores _.

This only matches one word character at a time, so if you use it by itself, the Search dialog will find each letter, number and underscore in the text separately.

\W

If you search for \W, you will find:

This matches any that is not a letter, number 123 or underscore _.