How to type a tab in gmail / blogger. The way to type special characters

To type a tab:
hold alt and type 009 on the number pad


For other characters you can refer to this page http://www.wikihow.com/Type-Symbols-Using-the-ALT-Key

I've copied them here

Method 1 of 5: On a PC

1. 
   1
   Learn how to key in an Alt-code.Hold down the Alt key and put in the numbers on the keypad to the right of the keyboard. When you finish entering the numbers and release the Alt key, the symbol will appear.
2. 
   2
   Learn how to key in Alt codes on a laptop. Press the "Num Lock" key. (If it's blue or grey, hold down the Fn key before pressing it.) The Number Lock activated the gray or blue keys on your keyboard; they should be arranged in a square. Hold down the ALT key, hit the & then the # and then use these numbers.

Method 2 of 5: On a Mac

1. 
   1
   Hold the Option key and press any other key to get custom characters
2. 
   2
   To get a second set of custom characters, hold down both the Option keyand the Shift key
3. 
   3
   See this wikiHow article for more information.

Method 3 of 5: Symbol Alt Codes

• Note:The following sections contain special characters. Without proper rendering support, you may see question marks, boxes, or other symbols that may not relate to the text beside it.

Symbols With the ALT key plus numbers © Copyrighted [0169] ♥ Likes [3] ® Reserved mark [0174] ℠ Service mark [8480] ℃ Celsius [8451] ℅ Care of [8453] ℉ Fahrenheit [8457] № Number symbol [8470] ℗ Sound recording copyright [8471] ℞ Prescription/pharmaceutical symbol [8478] Ω Ohm [8486] ℧ Inverted ohm [8487] ☀ Sunshine [9728] ☁ Cloud [9729] ☂ Umbrella [9730] ☃ Snowman [9731] ☄ Comet [9732] ★ Star (solid) [9733] ☆ Star (outline) [9734] ☇ Lightning [9735] ☈ Thunderstorm [9736] ☉ Sun [9737] ☊ Ascending node [9738] ☋ Descending node [9739] ☌ Conjunction [9740] ☍ Opposition [9741] ☎ Phone (solid) [9742] ☏ Phone (outline) 9743] ☐ Checkbox [9744] ☑ Ballot box [9745] ☒ Ballot box with X [9746] ☓ Saltire (St. Andrew's Cross) [9747] ☚ Left-pointing index finger (solid) [9754] ☛ Right-pointing index finger (solid) [9755] ☜ Left-pointing index finger (outline) [9756] ☝ Upwards-pointing index finger (outline) [9757] ☞ Right-pointing index finger (outline) [9758] ☟ Downwards-pointing index finger (outline) [9759] ☠ Skull & crossbones [9760] ☡ Caution sign [9761] ☢ Radioactive sign [9762] ☣ Biohazard sign [9763] ☤ Caduceus or "Kerykeion" [9764] ☥ Ankh [9765] ☦ Eastern Christian cross [9766] ☧ Chi Rho cross [9767] ☨ Patriarchal cross [9768] ☩ Greek cross [9769] ☪ Crescent moon & star [9770] ☫ Farsi symbol [9771] ☬ Adi Shakti [9772] ☭ Hammer & sickle [9773] ☮ Peace sign [9774] ☯ Yin & yang [9775] ☰ Trigram Heaven [9776] ☱ Trigram Lake [9777] ☲ Trigram Fire [9778] ☳ Trigram Thunder [9779] ☴ Trigram Wind [9780] ☵ Trigram Water [9781] ☶ Trigram Mountain [9782] ☷ Trigram Earth [9783] ☸ Dharma wheel [9784] ☹ Frowning face [9785] ☺ Smiley face [9786] ☻ Black smiley face [9787] ☽ Waxing crescent moon [9789] ☾ Waning crescent moon [9790] ☿ Mercury [9791] ♀ Venus (female symbol) [9792] ♁ Earth symbol [9793] ♂ Mars (male symbol) [9794] ♃ Jupiter [9795] ♄ Saturn [9796] ♅ Uranus [9797] ♆ Neptune [9798] ♇ Pluto [9799] ♈ Aries [9800]

Symbols With the ALT key plus numbers ♉ Taurus [9801] ♊ Gemini [9802] ♋ Cancer [9803] ♌ Leo [9804] ♍ Virgo [9805] ♎ Libra [9806] ♏ Scorpio [9807] ♐ Sagittarius [9808] ♑ Capricorn [9809] ♒ Aquarius [9810] ♓ Pisces [9811] ♔ White king [9812] ♕ White queen [9813] ♖ White rook [9814] ♗ White bishop [9815] ♘ White knight [9816] ♙ White pawn [9817] ♚ Black king [9818] ♛ Black queen [9819] ♜ Black rook [9820] ♝ Black bishop [9821] ♞ Black knight [9822] ♟ Black pawn [9823] ♠ Black spade suit [9824] ♡ Red heart suit [9825] ♢ Red diamond suit [9826] ♣ Black club suit (or shamrock) [9827] ♤ Red spade suit [9828] ♥ Black heart suit (or valentine) [9829] ♦ Black diamond suit [9830] ♧ Red club suit [9831] ♨ Hot springs [9832] ♩ Musical quarter note [9833] ♪ Musical eighth note [9834] ♫ Musical single bar note [9835] ♬ Musical double bar note [9836] ♭ Flat note [9837] ♮ Natural note [9838] ♯ Sharp note [9839] ✁ Cut above [9985] ✂ Cut here [9986] ✃ Cut below [9987] ✄ Scissors [9988] ✆ Public pay phone [9990] ✇ Film reel (tape spool) [9991] ✈ Airport/airplane [9992] ✉ Envelope/mail/email [9993] ✌ Victory sign [9996] ✍ Signature/sign here [9997] ✎ Pencil diagonal down [9998] ✏ Pencil [9999] ✐ Pencil diagonal up [10000] ✓ Checkmark [10003] ✔ Heavy checkmark [10004] ✕ Multiplication sign/X [100005] ✖ Heavy multiplication sign/X [10006] ✗ Ballot X [10007] ✘ Heavy ballot X [10008] ✝ Latin Roman cross [10013] ✞ Latin cross 3D shadow [10014] ✟ Latin cross outline [10015] ✠ Maltese Cross [10016] ✡ Star of David [10017] ❛ Quotation mark single turned comma [10075] ❜ Quotation mark single comma [10076] ❝ Quotation mark double turned comma [10077] ❞ Quotation mark double comma [10078] ™ Trademark [0153] ○= 777 ∞ Infinity [236] ▀ [479] ▐ Bar [478] ╔ [457] ► Play Forward [16] ◄ Play Reverse [17] ▲ Scroll Up [30] ▼ Scroll Down [31]

Method 4 of 5: Foreign Language Alt Codes

Symbols With the ALT key plus numbers Ç [128] ü [129] é [130] â [131] ä [132] à [133] å [134] ç [135] ê [136] ë [137] è [138] ï [139] î [140] ì [141] Ä [142] Å [143] É [144] æ [145] Æ [146] þ [0254] Þ [0222]	Symbols With the ALT key plus numbers ô [147] ö [148] ò [149] û [150] ù [151] ÿ [152] Ö [153] Ü [154] ¢ [155] £ [156] á [160] í [161] ó [162] ú [163] ñ [164] Ñ [165] ª [166] º [167] ¿ [168]

Symbols With the ALT key plus numbers + [43] - [45] × [0215] ÷ [0247]  % [37] ‰ [0137] ± [241] ¼ [0188] ½ [0189] ¾ [0190] ≡ [240] = [61] ≈ [247] ≥ [242]	Symbols With the ALT key plus numbers ≤ [243] √ [251] ⁿ [252] ¹ [0185] ² [0178] ³ [0179] π [227] ° [248] ∞ [236] µ [230] Σ [228] ∩ [239] ⌠ [244] ⌡ [245]