If its an image, look for anything that shows or suggests an element/concept of a journey;
- destination,
- mode of transport,
- travellers,
- obstacles
and then see how these are shown; are they brighter in colour, or black and white?
Are they really big and bold?
Is there contrast?
Overall, what makes them stand out?
If its a poem, look for
- alliteration,
- simile or metaphor,
- enjambment,
- repetition,
- imagery,
- change in tense
- rhyme scheme
(I think those are the most common from what I've seen in past papers)
Again, note what these techniques achieve, e.g. Alliteration emphasizes, enjambment conveys a sense of flow, change in tense conveys a reminiscient tone, etc. etc.
If its a short story, narrative extract, I usually look if it was written in 1st or 3rd person. 1st person is personal and involves the audience, 3rd person is more informative...well its really mostly bs i think lol
If its a newspaper article, look at the Heading, sub-heading and any accompanying images and relate to how they emphasize or express the journey.
Those are all the text types I can think of at the moment, hope that I could help